The following table contains the organisations that have been part of Google Summer of Code at least once from 2009 to 2020 - number of times they have participated, technologies they use, topics they work on, GSoC category, and the latest GSoC year they participated in.
More information and year-wise data available at thealphadollar/GSoCOrgFrequency.
| Name | Count | Technologies | Topics | Category | Latest Year |
|---|---|---|---|---|---|
| 3DTK | 1 | c/c++, cmake, opencv, ros, boost | 3d, point clouds, slam, robotics, mapping | Science and Medicine | 2018 |
| 52° North GmbH | 1 | java, android, javascript, python, react | web services, floating car data, ogc standards, trajectory analytics | Science and Medicine | 2020 |
| 52°North Initiative for Geospatial Open Source Software GmbH | 8 | android, java, ogcstandards, bigdata, spring, r, javascript, webservices, web | remote sensing, spatial data, geostatistics, spatial data infrastructures, floating car data, sensor web, web-based geoprocessing, geoprocessing, geoinformatics, ogc, web processing, sensorweb, spatial information, earth observation | Science and Medicine | 2019 |
| AbiWord | 5 | 2013 | |||
| AboutCode | 1 | python, c/c++, javascript, shellscript, staticanalysis | free and open source software license and origin, package and dependencies licensing and origin, package vulnerabilities and security, code scan and matching, code analysis and spdx | Programming Languages and Development Tools | 2017 |
| AboutCode.org | 2 | search, nlp, rust, postgresql, javascript, automaton, python, c/c++ | software analysis, oss licensing, application security, machine learning, license-scan, license compliance, dependencies, copyright, package managers | Programming Languages and Development Tools | 2020 |
| Academy Software Foundation (ASWF) | 1 | c/c++, python | 2d/3d graphics, cloud computing, file formats, color management, filmmaking | Graphics / Video / Audio / Virtual Reality | 2020 |
| Accord Project | 1 | javascript, react, coq, ocaml, compiler | smart contracts, legal, blockchain, compilers, ai | Programming Languages and Development Tools | 2020 |
| AerospaceResearch.Net | 6 | c++, java, vhdl, sqlite, boinc, raspberrypi, python, c/c++ | cubesats, space applications, software defined radio, distributed computing, simulations | Science and Medicine | 2020 |
| afl++ | 1 | fuzzing, c/c++, qemu, llvm, sanitizers | bug finding, software testing, fuzzing | Security | 2020 |
| Africa Soil Information Service | 1 | 2015 | |||
| aimacode | 4 | jupyter, ai, java, machinelearning, javascript, artificialintelligence, python3, python | machine learning, education, open education, artificial intelligence, education | Programming Languages and Development Tools | 2019 |
| Amahi | 5 | android, golang, streaming, rubyonrails, swift, restfulapi, containers, javascript, ios | front-end, web apps, mobile streaming, webapps, media server, streaming, storage server, storage, mobile-apps, web servers, web apps, networking, operating systems, home servers, networking, backups | Operating Systems | 2020 |
| Android Graphics Tools Team | 2 | spir-v, java, python3, vulkan, opengl, c/c++ | testing, debugging, bug finding, developer tools, profiling, 2d/3d graphics | Programming Languages and Development Tools | 2020 |
| AnitaB.org Open Source | 1 | ios, android, python, javascript | mobile, web, mobile programming, web programming | Other | 2020 |
| Ankur India | 2 | 2013 | |||
| AOSSIE | 1 | javascript, swift, kotlin, python | electronic voting, natural language processing, machine learning, environment, social science | End User Applications | 2020 |
| AOSSIE - Australian Open Source Software Innovation and Education | 3 | javascript/html/css, android, automatedreasoning, javascript/html5/css3, scala, xcode, ios, isabelleproofassistant, javascript, browserextension, android/ios | logic, machine learning, electronic voting, environment, natural language processing, philosophy | End User Applications | 2019 |
| AOSSIE - The Australian National University’s Open-Source Software Innovation and Education | 1 | scala, lisp, llvm, python, postgresql | logic, live programming, data analysis, health, privacy | Science and Medicine | 2016 |
| Apache Software Foundation | 9 | java, ruby, c, javascript, couchdb, python, erlang | other, dsl, ddd, database, big data, libraries, cloud, web | Other | 2018 |
| Apertium | 9 | bash, fsts, nlp, c++, python, xml | grammar, machine translation, language technology, less-resourced languages, natural language processing, lesser-resourced languages | Other | 2020 |
| Apertus Association | 4 | c++, embedded, vhdl, c, fpga, linux, c/c++ | camera, photography, real time, video, fpga, cinematography, embedded systems, image processing, vision, computational photography, digital imaging | Graphics / Video / Audio / Virtual Reality | 2020 |
| API Client Tools at Google | 1 | openapi, grpc, protocolbuffers, rpc, rest | apis, automation, code generation, api description | Programming Languages and Development Tools | 2019 |
| appleseed | 2 | python, opengl, c++11 | animation, simulation, rendering, computer graphics, image synthesis | Graphics / Video / Audio / Virtual Reality | 2020 |
| appleseedhq | 3 | c++, c++11, opengl, qt, python, c/c++ | graphics, animation, 3d, simulation, physics, mathematics, rendering, computer graphics, vfx, computer graphics, high performance, image synthesis | Graphics / Video / Audio / Virtual Reality | 2019 |
| ArchC | 1 | c++, python, archc | computer architecture, processor design, simulators | Programming Languages and Development Tools | 2016 |
| Arches Project | 1 | 2014 | |||
| Arduino | 1 | arduino, golang, c/c++ | electronics, robotics, interactivity | Programming Languages and Development Tools | 2020 |
| ArduPilot | 3 | rtos, drones, c++, embedded, ros, robotics, linux, python, c/c++ | drones, autopilot, embedded systems, robotics, vision, uav, rovers, real-time os | Other | 2020 |
| Ardupilot.org | 1 | drones, python, linux, robotics, c/c++ | vison, robotics, embedded systems, real-time os, drones | Other | 2019 |
| Artica ST ( Pandora FMS ) | 1 | 2012 | |||
| ASCEND | 6 | python, c, c/c++ | mathematical software, simulation, solver, system modelling, engineering | Science and Medicine | 2016 |
| Association Gephi | 1 | 2009 | |||
| Association Tatoeba | 1 | 2014 | |||
| Astrometry.net | 1 | 2011 | |||
| Atheme.org | 1 | 2009 | |||
| Atomic Blue | 1 | 2011 | |||
| Audacity | 1 | 2009 | |||
| Babel | 1 | javascript, babel, nodejs | compilers, ast, minifier, tc39 | Programming Languages and Development Tools | 2017 |
| Battle for Wesnoth | 5 | 2014 | |||
| Bazel | 2 | java, windows, go, bazel, linux, c/c++ | build tools, build systems, developer tools, development tools | Programming Languages and Development Tools | 2019 |
| BeagleBoard.org | 7 | c, tensorflow, hardwareacceleration, python, opencv, beaglebone, linuxkernel, raspberrypi, linux, javascript | real-time, physical computing, real time, teaching, embedded, machine learning, robotics, hardware, robotics, iot, privacy/security, coprocessing | Programming Languages and Development Tools | 2020 |
| BeagleBoard.org Foundation | 2 | real-time, c, python, gcc, beaglebone, physicalcomputing, iot, linux, javascript | physical computing, real time, audio, robotics, ros, iot, interfaces, coprocessing | Programming Languages and Development Tools | 2018 |
| BEAM Community | 6 | lisp, xmpp, mqtt, elixir, beam, erlang | communication system, real time, scalability, messaging, database, instant messaging, distributed computing, iot, distributed databases, realtime, cloud, clustering | Programming Languages and Development Tools | 2018 |
| BeeWare Project | 2 | android, java, mobile, javascript, python, ios | cross desktop, mobile, ui, cross-platform, app development, ide | Programming Languages and Development Tools | 2018 |
| Benetech | 3 | 2014 | |||
| Berkman Center at Harvard University | 2 | 2010 | |||
| Berkman Center for Internet & Society at Harvard University | 1 | 2012 | |||
| Berkman Center for Internet and Society | 1 | rubyonrails, javascript, sql/nosql, meteor.js, go | censorship, education, internet freedom, digital rights, law and policy | 2016 | |
| Berkman Klein Center for Internet & Society at Harvard University | 1 | rubyonrails, meteor.js, elasticsearch, javascript, elk | web, research, education, internet freedom, internet censorship | Other | 2018 |
| Berkman Klein Center for Internet and Society | 1 | rubyonrails, meteor.js, elasticsearch, python, java | web, research, education, internet freedom, internet censorship | Other | 2019 |
| Berkman Klein Center for Internet and Society at Harvard University | 1 | rubyonrails, meteor.js, d3, elasticsearch, javascript | digital rights, internet access, security and privacy, law, web | Web | 2017 |
| BigBlueButton | 1 | 2010 | |||
| Bika Open Source LIMS Collective | 1 | 2015 | |||
| Bio4j | 1 | 2014 | |||
| Bioconductor open source software for bioinformatics | 1 | 2013 | |||
| BioGears | 1 | c++11, c/c++, python, cmake | physiology, pharmacological modeling, computational biology, mathematical software | Science and Medicine | 2020 |
| biographer | 1 | 2012 | |||
| BioJavaScript | 1 | 2014 | |||
| BioJS | 1 | javascript, python | javascript, bioinformatics, life sciences, coding standards, visualization | Science and Medicine | 2016 |
| Biomedical Informatics, Emory University | 4 | deeplearning, java, hadoop, tensorflow, medicalimaging, python | science and medicine, web platform and services, big data visualization, distributed systems, data integration, data fusion, precision medicine, cloud | Science and Medicine | 2019 |
| Blender Foundation | 11 | c++, c, opengl, opencl, vulkan, python | graphics, animation, 3d, simulation, games, rendering, modeling, artist tools, tools, virtual reality, vfx | Graphics / Video / Audio / Virtual Reality | 2020 |
| Bloomington, IN | 1 | 2012 | |||
| Bloomington, IN, USA | 1 | 2013 | |||
| BlueZ | 4 | 2012 | |||
| BOINC project, University of California, Berkeley | 1 | 2012 | |||
| Bookie | 1 | 2014 | |||
| Boost C++ | 2 | c++librariesc++11c++14c++17c++20, c++17, c++11, c++ | c++, peer-reviewed libraries, programming libraries, c++ standard, c++ libraries c++ standard | Programming Languages and Development Tools | 2020 |
| Boost C++ Libraries | 8 | c++, c++14, boost, c++11, c++17 | c++ tools, c++ development, software engineering, c++ standardization, library | Programming Languages and Development Tools | 2018 |
| Boston University / XIA | 4 | xia, c, linuxkernel, ddos, advanceddatastructures | future internet architecture, future internet architecture, computer networking, research, research | Cloud | 2018 |
| BRL-CAD | 11 | qt, python, tcl/tk, opengl, opencl, javascript, c/c++, tcl | performance, 3d cad geometry, software visualization, 3d, solid modeling, data visualization, geometry, visualization, graphics user interface, solid geometry, ray tracing, cad/cam/cae, real-time computer graphics, 2d/3d graphics, cad | Graphics / Video / Audio / Virtual Reality | 2020 |
| Buildbot | 4 | 2015 | |||
| BuildmLearn | 3 | android, bootstrap, django, python | web apps, mlearning, mobile app, education | End User Applications | 2016 |
| Buildroot | 1 | gnumake, kconfig, python, shell | embedded systems, linux, build tools, compilation | Programming Languages and Development Tools | 2019 |
| BumbleBee Autonomous Underwater Vehicle (BBAUV) | 1 | 2014 | |||
| BZFlag | 1 | 2009 | |||
| Cadasta | 1 | python, django, javasc, javascipt | web, land rights, mapping, geo, geospatial | End User Applications | 2017 |
| caMicroscope | 1 | javascript, python, java, medicalimaging, tensorflow | science and medicine, data integration, distributed systems, cloud, precision medicine | Science and Medicine | 2020 |
| Canadian Center for Computational Genomics | 1 | python, r-project, javascript, react, nodejs | bioinformatics, science, visualization, statistics, web | Science and Medicine | 2019 |
| Canadian Centre for Computational Genomics | 2 | bash, r-project, javascript, nodejs, perl, awk, r, python, react | bioinformatics, data science, visualization, statistics, web development, next-generation sequencing | Science and Medicine | 2020 |
| Canadian Centre for Computational Genomics (C3G) - Montreal node | 1 | python, r-project, javascript, sql, git | bioinformatics, visualization, statistics, genomics, population genetics | Science and Medicine | 2016 |
| Casbin | 1 | go, javascript, react, rust, python | security, front-end, web, cloud, authorization | Security | 2020 |
| Catrobat | 5 | android, html5, java, php, swift, symfony, javascript, espresso, ios, web | web applications, creativity tools, gaming, programming tools, robotics, app development, programming language, education, scratch, visual programming, web | Programming Languages and Development Tools | 2020 |
| Catrobat (formerly Catroid Project) | 1 | 2014 | |||
| Catroid Project | 3 | 2013 | |||
| cBioPortal for Cancer Genomics | 3 | java, webapps, database, html, reactjs, bigdata, javascript, webservices, web | bioinformatics, biology, data visualization, cancer research, cancer, big data, genomics, precision medicine | Data and Databases | 2019 |
| CBMI@UTHSC | 1 | reactjs, python, flask, javascript, tensorflow | machine learning, deep learning, sepsis prediction, sepsis detection, web applications | Science and Medicine | 2019 |
| CCExtractor development | 7 | visualstudio, ai, node.js, rust, video, arduino, c, python, ml, flutter, raspberrypi, subtitles, ffmpeg, c#, linux, javascript, cloud | television, ai, linux, bittorrent, video, database, accesibility, accessibility, media analysis, subtitles, tv, language, media, vision, movies, decoder | Graphics / Video / Audio / Virtual Reality | 2020 |
| Celluloid | 1 | ruby, multi-threading, multi-core, zeromq, high-resolutiontimers | concurrency, parallel, evented, distributed, actor model | Programming Languages and Development Tools | 2016 |
| Center for Research In Open Source Software (CROSS) at UC Santa Cruz | 1 | ceph, hadoop, c++, javascript, python | distributed networks, reproducibility, storage systems, big data, opendata | Other | 2018 |
| Center for Research in Open Source Software at UC Santa Cruz | 1 | python, javascript, c/c++, verilog | cloud databases, reproducibility, ceph, architecture, generative text | Other | 2019 |
| Center for the Study of Complex Systems, Univ of Michigan | 1 | 2009 | |||
| Center for the Study of Complex Systems, University of Michigan | 1 | 2011 | |||
| CentOS Project | 1 | 2015 | |||
| Centre for Computational Medicine, SickKids Research Institute | 1 | 2014 | |||
| Ceph | 3 | object-storage, python, c/c++, c++ | cloud storage, network storage, distributed systems, storage, cloud | Data and Databases | 2017 |
| Ceph Foundation | 1 | c/c++, jenkins, python, javascript, shellscript | distributed systems, software defined storage | Other | 2020 |
| Ceph Storage | 1 | 2015 | |||
| CERN SFT | 5 | c++, javascript, clang, python | machine learning, numerical and data analysis software, cloud, simulation software | Science and Medicine | 2016 |
| CERN Virtual Machine (CernVM) | 1 | 2011 | |||
| CERN-HSF | 4 | parallelization, parallelalgorithms, machinelearning, concurrency, dataanalysis, python, c/c++ | algorithmics, machine learning, physics, big data, particle physics, high-energy physics, performance optimization | Science and Medicine | 2020 |
| Cesium community | 2 | 2015 | |||
| CGAL - Computational Geometry Algorithms Library | 3 | 2012 | |||
| CGAL Project | 3 | c++, swig, github, qt, python, git | mesh processing, webhook, geometry, triangulation, geometry processing, point set processing, computational geometry, arrangement | Science and Medicine | 2020 |
| CHAOSS | 2 | jupyter, kibana, javascript, elasicsearch, mysql, elasticsearch, python | analytics, sustainability, metrics, health, community health, community | Other | 2020 |
| CHAOSS: Community Health Analytics Open Source Software | 1 | python3, javascript | data visualization, visualization, machine learning | End User Applications | 2018 |
| Chapel | 4 | c++, c, python, highperformancecomputing, chapel | parallel computing, compilers, programming languages, distributed computing, high performance computing | Programming Languages and Development Tools | 2020 |
| Checker Framework | 4 | java | programmer productivity, verification, type systems, pragrammer productivity, software engineering, programming languages, bug finding | Programming Languages and Development Tools | 2020 |
| Checkstyle | 3 | java, xpath, antlr | coding standards, coding conventions, coding conventions, static code analysis‎, code review tool, static code analysis | Programming Languages and Development Tools | 2020 |
| Chromium | 3 | 2013 | |||
| CircuitVerse.org | 2 | bootstrap, postgresql, html5, canvas, html5canvas, rails, javascript | digital logic design, pedagogy, education, education, simulations, web | Web | 2020 |
| CiviCRM | 5 | d3js, php, mysql, javascript, angularjs | membership management, civic technology, events management, crm, fundraising, nonprofits | Data and Databases | 2020 |
| CiviCRM LLC | 1 | php, mysql, angularjs, d3.js | civil society, contacts&calendar sync | End User Applications | 2018 |
| Classical Language Toolkit | 3 | java, python, javascript | web, ai, nlp, machine learning, machine translation, human language technologies, machine trans, natural language processing, machine, web | Other | 2018 |
| Climate Code Foundation | 2 | 2012 | |||
| CLiPS, University of Antwerp | 3 | machinelearning, mongodb, javascript, python | data mining, machine learning, text analytics, text generation, artificial intelligence, computational linguistics, natural language processing | Data and Databases | 2019 |
| Clojure | 4 | clojure, functionalprogramming, jvm, clojurescript, javascript | compilers, development tools, build systems, programming language, functional programming | Programming Languages and Development Tools | 2017 |
| Clojure/dev | 1 | 2012 | |||
| Cloud Native Computing Foundation (CNCF) | 4 | docker, rust, prometheus, golang, grpc, go, kubernetes, cloud, fluentd, servicemesh | web, container, tracing, monitoring, logging, service mesh, containers, devops, kubernetes, cloud native, cloud | Cloud | 2020 |
| CloudCV | 6 | angularjs, docker, deeplearning, machinelearning, torch, caffe, artificialintelligence, javascript, computervision, django, reactjs, lua, python3, python, aws, cloud | tensorflow, django, cloud computing, machine learning, angularjs, artificial intelligence, deep learning, computer vision, web development, python, deep-learning, react | Cloud | 2020 |
| CMUSphinx | 2 | hiddenmarkovmodels, c, python, cross-platform, javascript | real time, user interface, speech recognition, pronunciation, education | Graphics / Video / Audio / Virtual Reality | 2017 |
| CMUSphinx Speech Recognition Toolkit | 1 | 2011 | |||
| coala | 3 | haskell, emberjs, docker, java, django, reactjs, antlr, python3, python, angularjs | chatops, code analysis, devops, language server, dependency management, devops, chatops | Programming Languages and Development Tools | 2019 |
| Code for America | 3 | 2013 | |||
| CodeCombat | 1 | 2014 | |||
| CodeMirror | 1 | 2014 | |||
| Comprehensive C Archive Network | 1 | 2009 | |||
| Computational Biology @ University of Nebraska-Lincoln | 4 | postgresql, java, javascript, mysql, reactjs, webgl, flask, react | bioinformatics, biological networks, data science, real time, systems biology, networks, omics data, image analysis, network simulation, web application, network biology, computational biology | Science and Medicine | 2019 |
| Computational Science and Engineering at TU Wien | 5 | c++, java, html, css, javascript | simulation, visualization, science and enineering, mesh generation, internet of things | Science and Medicine | 2016 |
| Connexions | 2 | 2012 | |||
| Continuous Delivery Foundation | 1 | tekton, spinnaker, ci/cd, screwdriver | continuous delivery, continuous integration, cloud, devops | Cloud | 2020 |
| Conversations.im | 2 | javafx, android, xmpp, java, gtk, javascript, python | ux, real time, mobile, ui, instant messaging, web, desktop, usabilty | Social / Communications | 2018 |
| Copyleft Games | 4 | xmpp, c, javascript, opengl, python | graphics, developer tools, networking, web, education | Graphics / Video / Audio / Virtual Reality | 2017 |
| coreboot | 9 | x86, arm, c, assembly, openhardware, assembler | drivers, boot loader, real time, hardware, embedded systems, firmware | Operating Systems | 2020 |
| Creative Commons | 6 | vue.js, postgresql, javascript, django, elasticsearch, python, wordpress | nonprofit, creative commons, copyleft, legal, nonprofits, web | Web | 2020 |
| CRIU | 1 | linux, c, assembly | cloud, live migration, snapshots | Operating Systems | 2020 |
| CRIU (Checkpoint/Restore in User-space) | 1 | docker, linux, containers, kernel | cloud, save/restore, load-balancing, zero-downtime, migration | Operating Systems | 2019 |
| Crowdsourcing Biology | 1 | 2012 | |||
| Crowdsourcing Biology at the Scripps Research Institute | 1 | 2013 | |||
| Crypto Stick | 2 | 2014 | |||
| Crystal Space | 6 | 2014 | |||
| Cuneiform Digital Library Initiative | 1 | python, mariadb, rdf, php, nltk | natural language processing, machine translation, information retrieval, linguistics, semantic web | Data and Databases | 2018 |
| Cuneiform Digital Library Initiative (CDLI) | 2 | html/css, java, php, html, css, mysql, python3, python | lod, data processing pipeline, nlp, data visualization, digitization, data processing, web portal, computer vision, computational linguistics, data-collection | Data and Databases | 2020 |
| CVXPY | 1 | python | convex optimization, optimization, dsl | 2016 | |
| D Foundation | 1 | dlang, c++ | compilers | Programming Languages and Development Tools | 2016 |
| D Programming Language | 1 | dlang, linux, windows, osx, bsd | programming languages, object-oriented programming, functional programming, web programming, system programming | Programming Languages and Development Tools | 2019 |
| darktable | 1 | 2011 | |||
| Dart | 1 | dart, flutter, programming-language | mobile-apps | Programming Languages and Development Tools | 2020 |
| DBpedia | 4 | apachespark, nosql, rdf, java, scala, graph, python, sparql, javascript, skala | knowledge extraction, data science, data analytics, data extraction, wikipedia, knowledge graph, big data, semantic web, linked data, linked data, natural language processing, ontologies | Data and Databases | 2020 |
| DBpedia & DBpedia Spotlight | 3 | 2015 | |||
| DBpedia Spotlight | 2 | nosql, rdf, java, scala, python | data science, big data, semantic web, natural language processing | Data and Databases | 2016 |
| Debian | 3 | irc, python, javascript, c/c++, git | operating system, packaging, kernel, operating systems, package managers | Operating Systems | 2020 |
| Debian Project | 8 | c++, java, c, ruby, javascript, django, python, c/c++ | packaging, operating system, communications, continuous integration, applications, operating systems, community, web | Operating Systems | 2018 |
| Department of Biomedical Informatics, Stony Brook University | 1 | 2015 | |||
| Dept. of Biomedical Informatics, Emory University | 2 | 2013 | |||
| Developers Italia | 2 | html/css/js, java, scala, ruby, go, node.js, python, c/c++ | web applications, data-science, open data, public code, identity, open government, open source, government | Other | 2019 |
| Differ | 1 | 2012 | |||
| Digital Impact Alliance | 2 | android, java, php, javascript, python | charity, social good, international, humanitarian, end user application, health | Other | 2019 |
| Digital Impact Alliance (DIAL) at UN Foundation | 1 | c++, javascript, android, php, python | nonprofit, humanrights, humanitarian, international, global | Other | 2020 |
| Digital Mars | 2 | 2012 | |||
| Discourse | 2 | html/css, docker, ruby, rubyonrails, ember, javascript, javascipt | web applications, communication, forum, email, real time, web development, asynchronous, community | Social / Communications | 2017 |
| Distributed and Unified Numerics Environment (DUNE) | 2 | python, cmake, c++ | scientific computing, physics, mathematics, partial differential equations, high performance computing | Science and Medicine | 2016 |
| Django Software Foundation | 11 | python, django | web development, web applications, web | Web | 2020 |
| DocBook Project | 2 | 2012 | |||
| Dojo Foundation | 1 | 2010 | |||
| DokuWiki | 1 | 2011 | |||
| Dr. Memory | 1 | 2014 | |||
| DragonFly BSD | 5 | 2013 | |||
| Dreamwidth Studios | 1 | 2010 | |||
| Drizzle | 3 | 2012 | |||
| Drizzle Database | 1 | 2013 | |||
| Drupal | 11 | cms, webdevelopment, object-oriented, contentmanagementsystem, html5, drupal8, sql, php, symfony, javascript, web | content management, backend, object-oriented, apps, object oriented programming, symfony, drupal 8, web development, mobile-apps, cms, web application, content management, javascript, cms, martech, object-oriented, sql, web development, php, web | Web | 2020 |
| DSpace Foundation | 1 | 2009 | |||
| DuraSpace | 2 | 2011 | |||
| e-cidadania | 1 | 2012 | |||
| Earth Science Information Partners | 1 | python, kubernetes, jupyter, deeplearning, gdal | earth observation, cloud databases, data visualisation, semantic web, data-science | Science and Medicine | 2019 |
| Earth Science Information Partners (ESIP) | 1 | kubernetes, dask, xarray, python, javascript | earth data, semantics, discovery, data visualization, earth science | Data and Databases | 2018 |
| Eclipse Foundation | 3 | jakartaee, eclipsejavaide, java, deeplearning, geospatial, che, c/c++ | java, iot & edge, robotics, eclipse, tools, cloud native java, automotive | Other | 2020 |
| Eclipse Vert.x | 1 | java, reactiveextensions, kotlin, microservices, event-loop | reactive, unopionated, polyglot, distributed, high performance computing | Programming Languages and Development Tools | 2017 |
| Ecole Polytechnique Federale de Lausanne, Scala Team | 1 | 2011 | |||
| Elastic | 2 | java, golang, node.js, jruby, react | search, data analytics, data visualization, security, monitoring, logging, observability, databases | Data and Databases | 2020 |
| Electronic Frontier Foundation/The Tor Project | 2 | 2012 | |||
| Elgg | 1 | 2011 | |||
| Elm Software Foundation | 1 | elm, javascript, haskell | functional programming, compilers, web applications, programming languages, user interface | Programming Languages and Development Tools | 2017 |
| Embox | 1 | c, gcc, assembly | embedded systems, rtos | Operating Systems | 2020 |
| Encyclopedia of Life | 1 | 2015 | |||
| Environmental Data And Governance Initiative | 1 | python, javascript, rubyonrails, googlecloud, go | crawling, api, open data, machine learning, open science | Data and Databases | 2017 |
| Erlang Ecosystem Foundation | 1 | erlang, elixir, lfe, beam | language, soft real-time, distributed systems, messaging, instant messaging | Programming Languages and Development Tools | 2020 |
| ES Operating System | 1 | 2009 | |||
| ESUG (European Smalltalk User Group) | 2 | 2013 | |||
| Eta | 1 | haskell, jvm, java | functional-programming, runtime systems, compilers, programming-tools | Programming Languages and Development Tools | 2018 |
| Etherboot Project | 3 | 2011 | |||
| European Smalltalk User Group (ESUG) | 1 | 2010 | |||
| European Space Agency, The Advanced Concepts Team | 1 | 2010 | |||
| Evergreen | 1 | 2012 | |||
| Evergreen Project | 1 | 2011 | |||
| Expert Labs | 1 | 2010 | |||
| 1 | 2010 | ||||
| Fedora Project | 5 | html/css/js, linux, webdevelopment, angular, postgresql, html5, golang, postgres, python, rest, flask, linuxdistribution, python3, ansible, javascript, git | distribution, community architecture, server, mobile, metrics, linux distribution, containers, upstream, realtime messaging, contributor activity, linux, web development, desktop, community | Operating Systems | 2020 |
| Fedora Project & JBoss.org (Red Hat) | 1 | 2009 | |||
| FFmpeg | 8 | c99, asm, c, assembly, assembler, git | audio, image, video, compressio, multimedia, subtitles, image processing, filter, compression | Graphics / Video / Audio / Virtual Reality | 2020 |
| FFmpeg / Libav | 1 | 2011 | |||
| FiberCorps | 1 | 2011 | |||
| Fiji | 1 | 2009 | |||
| Flowgrammable | 1 | 2014 | |||
| fluxbox | 1 | 2011 | |||
| Formal Systems Laboratory at UIUC | 1 | 2012 | |||
| FOSDEM | 2 | html/css, voctomix, postgresql, influxdb, grafana, rubyonrails, javascript, git | conference, ruby, programming languages, programming tools, video processing, rails, web development, rails application, web | Programming Languages and Development Tools | 2019 |
| FOSDEM VZW | 1 | rubyonrails, postgresql, git | web, programming tools, programming, programming languages, ruby | Programming Languages and Development Tools | 2016 |
| FOSSASIA | 8 | android, java, jsonapi, c, php, javascript, artificialintelligence, reactjs, python | graphics, search, event management, fashiontech, machine learning, mobile, personal assistants, voice assistants, json, artificial intelligence, open science, web development, cloud, web | Other | 2019 |
| FOSSology | 2 | twig, lamp, postgresql, php, python, linux, javascript, c/c++ | licensing, open source, oss licencing, license-scan, license compliance, compliance, spdx | End User Applications | 2020 |
| FOSSology Project | 1 | postgresql, php, c/c++, jquery, bash | compliance, license-scan, oss licensing, spdx, oss compliance | Other | 2019 |
| Foundation for Learning Equality | 1 | 2015 | |||
| FrameNet Brasil (UFJF) | 1 | php, mysql, javascript, python | natural language processing, natural language understanding, multimodality, video processing, multilinguality | Data and Databases | 2020 |
| FrameNet Brasil at the Federal University of Juiz de Fora | 1 | php, mysql, javascript, python | natural language processing, multimodality, natural language understanding, image processing, machine translation | Data and Databases | 2019 |
| Free and Open Source Silicon Foundation | 5 | synthesis, chisel, webdevelopment, c++, vhdl, c, fpga, compiler, jenkins, javascript, openhardware, verilog, risc-v, python | eda tools, digital design, simulation, compilers, debugging, silicon, fpga, hardware, debug, open hardware, embedded systems, web community, electronic design tools, eda, web services, web | Other | 2020 |
| Free Software Initiative of Japan | 1 | 2009 | |||
| Free UK Genealogy | 1 | mongodb, rubyonrails, mysql, python, css/html | ai, machine learning, ui/ux, web apps, open data | Data and Databases | 2018 |
| FreeBSD | 9 | make, shell, llvm, clang, shellscript, assembly, c/c++ | kernel, embedded, virtualization, embedded systems, security, embedded systems, embeddded, cloud, kernel | Operating Systems | 2019 |
| FreeBSD Project | 1 | c/c++, llvm, shellscript, assembly, make | operating systems, virtualization, kernel, cloud, embedded systems | Operating Systems | 2020 |
| FreedroidRPG | 2 | 2011 | |||
| Freenet Project Inc | 5 | 2014 | |||
| Freeseer recording and streaming suite | 1 | 2012 | |||
| Freeseer video recording and streaming suite | 1 | 2011 | |||
| FreeType | 3 | fonts, gnumake, c, python, gnuautotools | fonts, graphics, opentype, rendering, truetype, library | Graphics / Video / Audio / Virtual Reality | 2020 |
| Freifunk | 9 | html/css, html/css/js, olsr, c, ruby, javascript, python, html, shellscript, lua, openwrt, lede/openwrt, batman | routing protocols, web applications, firmware development, software-defined networking, web apps, wireless communications, wireless, monitoring, user interface, routing, embedded systems, network, wifi, embedded systems, software defined networking, mesh | Social / Communications | 2019 |
| Frenetic | 1 | 2014 | |||
| Frescobaldi | 1 | python, pyqt | music engraving | End User Applications | 2017 |
| FRRouting | 1 | c, linux, linuxkernel, networking, lua | networking, software defined networking, linux, performance, systems programming | Other | 2020 |
| Funf.org | 1 | 2013 | |||
| Gambit: Software Tools for Game Theory | 2 | javascript | academic projects, game theory, graphics | Science and Medicine | 2016 |
| Ganeti | 4 | haskell, virtualization, kvm, xen, python | virtualization, automation | 2016 | |
| Ganglia | 1 | 2014 | |||
| GCC | 1 | 2009 | |||
| GCC - GNU Compiler Collection | 4 | 2015 | |||
| GCC, the GNU Compiler Collection | 2 | 2011 | |||
| GDevelop | 1 | javascript, c/c++, webdevelopment, gamedevelopment, react | gaming, graphics, web applications, web, compilers | Programming Languages and Development Tools | 2020 |
| Geeklog | 2 | 2010 | |||
| Genes, Genomes and Variation | 4 | python, rest, perl, mysql, javascript | bioinformatics, data analysis, data visualization, web platform and services, database, genomics, data visualisation, databases, scientific visualization, web | Science and Medicine | 2019 |
| GENIVI Alliance | 2 | yocto, embedded, java, some/ip, c/c++, automotive | graphics, functional safety, communication, middleware, diagnostics, bigdata, embedded systems, automotive | Other | 2019 |
| GENIVI Development Platform | 1 | linux, c, yocto, c++, qt | automotive, cars, embedded systems, embedded, automobile | Programming Languages and Development Tools | 2017 |
| GenMAPP | 1 | 2009 | |||
| GenMAPP, Cytoscape, WikiPathways & Reactome | 1 | 2010 | |||
| Genome Informatics | 3 | 2013 | |||
| Gentoo | 1 | 2009 | |||
| Gentoo Foundation | 10 | bash, shell, sql, linuxkernel, perl, shellscript, linux, python, c/c++ | init systems, embedded, application security, init, virtualization, security, embedded systems, operating systems, embeddded, package management, operating system, linux, embedded systems | Operating Systems | 2020 |
| GeomScale | 1 | c++, r, python | mathematical software, statistics, biology, optimization, finance | Science and Medicine | 2020 |
| Gephi Consortium | 3 | 2013 | |||
| Gephi NGO | 1 | 2010 | |||
| GFOSS - Open Technologies Alliance | 1 | python3, php/javascript/html, css/html, java, c/c++ | python, gtk, java jsp, c++ tools, javascript | Other | 2018 |
| GIMP | 1 | 2012 | |||
| Git | 10 | shell, c, git, shellscript | version control, version-control, dvcs, dvcs | Programming Languages and Development Tools | 2020 |
| Git Development Community | 1 | 2009 | |||
| GitHub | 2 | atom, ruby, node.js, c#, git | version control, collaboration, git, editor | 2016 | |
| Global Alliance for Genomics & Health | 2 | protobuf, java, sql, python | data sharing, big data, genomics, standards, apis | Science and Medicine | 2016 |
| Global Alliance for Genomics and Health | 4 | c++, java, sql, mongodb, spring, node.js, python, c/c++, cloud | bioinformatics, data sharing, genomics, standards, bioinformatics, genetics, web | Science and Medicine | 2020 |
| GNOME | 11 | rust, vala, gtk, c, javascript, gtk+, gobject, python | games, design, desktop applications, desktop environment, applications, end user application, application, productivity, operating system, end user applications, desktop | End User Applications | 2020 |
| GNOME Project | 1 | 2011 | |||
| GNSS-SDR | 8 | c++librariesc++11c++14c++17c++20, gnss, c++, c++14, c++11, sdr, c++17, c/c++ | software defined radio, signal processing, geolocation, gnss, navigation, digital signal processing, geolocation, communications, software defined radio, navigation, communications, communications engineering | Science and Medicine | 2020 |
| GNU Compiler Collection | 1 | c/c++, gnuautotools | compilers, toolchain, openmp | Programming Languages and Development Tools | 2019 |
| GNU Compiler Collection (GCC) | 2 | gnumake, c++, openmp, c, c/c++, gnuautotools | developer tools, toolchain, compilers, openmp | Programming Languages and Development Tools | 2020 |
| GNU Image Manipulation Program | 3 | 2013 | |||
| GNU Image Manipulation Program - GIMP | 1 | 2010 | |||
| GNU Mailman | 3 | email, rest, django, python3, python | email, mailing lists, communication | End User Applications | 2019 |
| GNU Octave | 6 | hg, c++ | numerical computation, numerical methods, scientific computing, numerical computation, mathematics, numerical and data analysis software, data processing, matlab | Programming Languages and Development Tools | 2020 |
| GNU Project | 8 | lisp, posix, eiffel, c, python | operating systems, free software, operating system | Operating Systems | 2018 |
| GNU Radio | 7 | android, dsp, c++, softwareradio, rf, simd, qt, softwaredefinedradio, python | real-time, radar, signal processing, wireless communications, dsp, software radio, digital signal processing, communication, wireless communication, information theory, cognitive radio, cybersecurity, software defined radio, spectrum analysis, gui, communications engineering | Other | 2020 |
| GnuCash Free Accounting Software | 1 | 2011 | |||
| Go OpenOffice | 2 | 2010 | |||
| Godot Engine | 3 | c++, crossplatform, cpp, github, gdscript, vulkan, opengl, c/c++ | graphics, graphics, real time, game development, gaming, rendering, cross-platform, virtual reality, game engine | Graphics / Video / Audio / Virtual Reality | 2020 |
| Google Caja | 1 | 2010 | |||
| Google Kubernetes | 1 | 2015 | |||
| Google Open Source Programs Office | 5 | 2014 | |||
| Google’s Open Source Programs Office | 1 | 2009 | |||
| GPAC | 2 | c++, mp4, c, dash, opengl, mp4box, javascript | packaging, streaming, industry, playback, rendering, interactivity, multimedia, research | Graphics / Video / Audio / Virtual Reality | 2020 |
| gprMax | 1 | python, cuda, openmp, cython, mpi | engineering, geophysics, science, electromagnetics, ground penetrating radar | Science and Medicine | 2019 |
| Grameen Foundation | 1 | 2010 | |||
| Grameen Foundation - MOTECH | 1 | 2014 | |||
| GraphQL Foundation | 1 | graphql, javascript, react, node.js | data and databases, api, graphql | Data and Databases | 2020 |
| Grassroots DICOM | 2 | 2012 | |||
| Green Navigation | 2 | apachespark, electromobility, postgresql, java, tensorflow, go, polymer, javascript, react | web applications, machine learning, mobile, database, routing, eletric mobility, algorithm prototyping/visualization, web | Other | 2017 |
| Groovy Community | 1 | 2014 | |||
| gRPC | 2 | scalability, grpc, distributedsystems, microservices, http/2, networking, cloud, micro-services | full stack web and mobile, micro services, infrastructure, distributed systems, communications, microservices, middleware, apis, cloud, distributed networks | Cloud | 2018 |
| GStreamer | 4 | 2012 | |||
| Hackystat | 1 | 2009 | |||
| Haiku | 9 | unix, x86, posix, c++, ffmpeg, arm, bsdunix, webkit | graphics, drivers, filesystem, network, virtualization, filesystems, frameworks, desktop integration, user interface, operating system, media, desktop, kernel | Operating Systems | 2020 |
| haskell.org | 10 | haskell, ghc, cabal, servant, codeworld | haskell, compilers, functional-programming, education, programming languages, education, functional programming, build tools | Programming Languages and Development Tools | 2020 |
| Hazelcast | 1 | java, distributedsystems | in memory data grid, data streaming, stream processing | Data and Databases | 2020 |
| Health Information Systems Programme | 3 | android, gradle, java, reactjs, javascript | e-health, mobile, gis, data processing, global health and development | 2016 | |
| Hedgewars Project | 2 | 2012 | |||
| HelenOS group at Department of Distributed and Dependable Systems, Charles University in Prague | 3 | 2014 | |||
| Helsinki Institute for Information Technology | 1 | 2011 | |||
| Homebrew | 4 | bash, macos, git, osx, ruby, github, rspec | macos, distribution, homebrew, package system, development tools, github, package management, linux, package managers, terminal applications | Programming Languages and Development Tools | 2020 |
| HPCC Systems® | 1 | 2015 | |||
| Hugin - Panorama photo stitcher | 1 | 2011 | |||
| Hugin and panotools | 1 | 2010 | |||
| Hugin/Panotools | 1 | 2009 | |||
| Hydra Ecosystem | 2 | sql, javascript, python, rest, redis, apis, flask, hydra | docker, http, rest apis, api, knowledge graph, semantic web, web development, hydra, web | Web | 2020 |
| illumos | 3 | 2013 | |||
| illumos.org | 1 | dtrace, illumos, unix, openzfs, zfs | drivers, virtualization, storage, networking, kernel | Operating Systems | 2017 |
| INCF | 4 | jupyter, c++, java, tensorflow, javascript, cuda, python, c/c++, xml, gpu | data visualization, brain simulation, visualization, brain modelling, brain imaging, big data, neuroscience, science, brain modeling, science, neuroimage processing, big data, bio/neuro image processing | Science and Medicine | 2020 |
| Inclusive Design Institute | 7 | html5, php, html, jquery, css, node.js, javascript | web applications, inclusion, accessibility, inclusivity, web development, web | End User Applications | 2020 |
| Inclusive Design Institute (IDI) | 1 | 2011 | |||
| Indic Project | 1 | android, python, javascript, rubyonrails, c++ | natural language processing, language techology, input methods | End User Applications | 2016 |
| Inkscape | 11 | c++, gtk, css, c++11, gtk+, python, svg | graphics, graphics, geometry, standards, web, vector graphics | Graphics / Video / Audio / Virtual Reality | 2020 |
| Inria Foundation | 1 | c/c++, qt, webassembly, asm, communicationprotocol | medical simulation, medical research, physics, real-time, scientific computing | Science and Medicine | 2018 |
| Institut für Angewandte Informatik (InfAI) e.V. | 1 | java, javascript, a-frame, neo4j, htcvive | virtual reality, software quality, visualization, software analytics, web | Graphics / Video / Audio / Virtual Reality | 2019 |
| Institute for Artificial Intelligence | 4 | lisp, c++, unrealengine, ros, prolog, python | unreal engine, simulation, machine learning, robot perception, robotics, artificial intelligence, perception, knowledge representation | Science and Medicine | 2018 |
| Intel Media and Audio for Linux | 4 | gstreamer, encode, va-api, audio, video, vpp, c, vaapi, hardwareacceleration, decode, libxcam, codecs, ffmpeg, multimedia, soundopenfirmware | camera, video encode, video apis, video, opensource audio firmware, encoding, video post processing, video processing, video framework, accelerated media, ffmpeg neuronetwork, video decode, audio firmware, compress, video decoding/encoding, hardware accelerated media processing, 360 stereo video | Graphics / Video / Audio / Virtual Reality | 2020 |
| Interactive Spaces | 1 | 2015 | |||
| Interface Ecology Lab @ Texas A&M University | 2 | 2012 | |||
| InterMine | 2 | clojure, postgresql, java, python, r, javascript | bioinformatics, biology, data science, biology, genomics, open science, open science, web, data visualisation | Science and Medicine | 2019 |
| International GeoGebra Institute | 4 | 2015 | |||
| International Neuroinformatics Coordinating Facility | 6 | c++, java, javascript, python, gpu | data science, simulation, visualization, big data, neuroscience | Science and Medicine | 2016 |
| Internet Archive | 4 | pthon, php, python, node.js, elasticsearch, javascript | non-profit, books, web archving, voice apps, library, web archiving, archive, web extensions, web archives | Web | 2020 |
| Internet Systems Consortium | 2 | c99, cassandra, javascript, dhcp, rest, mysql, python, c/c++ | infrastructure, stateful, dhcp, ipv6, internet, dns, networking | Other | 2019 |
| Iowa Flood Center | 1 | 2013 | |||
| IP-over-P2P Project | 1 | 2015 | |||
| iPXE | 1 | 2012 | |||
| Isabelle | 1 | 2011 | |||
| Italian Mars Society | 2 | 2014 | |||
| JabRef | 1 | java, javafx, latex | academia, reference manager, bibtex, pdf | End User Applications | 2019 |
| Jato | 1 | 2009 | |||
| Jato VM | 1 | 2011 | |||
| Java Pathfinder Team | 1 | java, jvm, android, distributedsystems | program analysis, testing, verification, model checking, environment generation | Programming Languages and Development Tools | 2016 |
| JBoss Community | 9 | android, java, golang, apachekafka, aerogear, mobil, opentracing, asciidoctor, kubernetes, react, ios, ide | testing, mobile, database, javaee, monitoring, enterprise applications, openshift, programming languages and development tools, eclipse, microservices, aerogear, codeuino, kubernetes, enterprise application, mobile development, cloud | Web | 2020 |
| JdeRobot - Universidad Rey Juan Carlos | 5 | gazebo, c++, opencv, ros, python, c/c++ | teaching, education, robotics, robot simulator, computer vision, developer tools, computer vision | Other | 2020 |
| Jenkins Project | 4 | docker, java, jenkins, machinelearning, html, css, groovy, go, kubernetes, javascript | java, development tools, continuous integration, development, devops, continuous delivery, automation, developer tools | Programming Languages and Development Tools | 2020 |
| JGraphT | 1 | java | graphs, algorithms, data structures, mathematics, network analysis | Programming Languages and Development Tools | 2018 |
| Jikes RVM | 3 | 2012 | |||
| Jitsi | 3 | xmpp, java, sip, webrtc, reactnative, javascript, react | real time, video conferencing, real time communications, networking, multimedia, web | Social / Communications | 2018 |
| Jitsi (SIP Communicator), Kamailio and SEMS | 1 | 2011 | |||
| jMonkeyEngine | 1 | 2014 | |||
| Joomla! | 6 | cms, html/css, php, html5/css3, html, jquery, css, mysql, javascript | mvc, cms, cms, object-oriented, object-oriented, web applications, programming languages, web application, web development, web | Web | 2019 |
| Joomla! (Open Source Matters) | 2 | 2014 | |||
| Joplin | 1 | node.js, electron, reactnative, terminal-kit, react | notes, synchronisation, sharing, encryption, cross-platform | End User Applications | 2020 |
| jQuery Foundation | 2 | html5, css, jquery, javascript | framework development, unit testing, user interface components, event handling, software testing | 2016 | |
| JRuby | 2 | 2013 | |||
| JSK Robotics Laboratory | 2 | lisp, openhrp, ros, prolog, euslisp, openrtm | robotics, artificial intelligence | Science and Medicine | 2017 |
| JSK Robotics Laboratory / The University of Tokyo | 2 | ros, lisp | ros, robotics | Science and Medicine | 2019 |
| K-9 Mail | 2 | android, java | email, communication | End User Applications | 2017 |
| Kapitan | 2 | jsonnet, jinja2, terraform, kubernetes, python3, python | great developer tooling, cloud, programming languages, kubernetes, cloud | Programming Languages and Development Tools | 2020 |
| KDE | 9 | c++, php, qt5, qt, cmake | graphics, wiki, desktop application, communication, mobile, desktop applications, science, desktop, education | End User Applications | 2017 |
| KDE Community | 3 | c/c++, c++, c, opencv, qt5, qt, qml | graphics, deskstop, privacy, desktop application, applications, desktop environment, science, vr, education | End User Applications | 2020 |
| Kernel.org - the Linux Kernel Organization | 3 | 2012 | |||
| Kiwix | 3 | android, node.js, c++, java, python, kotlin, qt, python3, javascript, c/c++ | offline, android, offline access | Web | 2020 |
| KNIME | 1 | javascript, java, tensorflow | data analytics, data science, machine learning, deep learning, image processing | Data and Databases | 2019 |
| Kodi Foundation | 2 | c++, sqlite, mysql, ffmpeg, python | media, games, audio, video | End User Applications | 2020 |
| KolibriOS | 1 | fasm, flatassembler, x86assembly, i386, i586 | desktop, operating systems, drivers, hardware, lowlevel | Operating Systems | 2016 |
| KolibriOS Project Team | 1 | 2014 | |||
| Komodo OpenLab | 1 | 2012 | |||
| Komodo OpenLab Inc. | 1 | 2011 | |||
| Kubeflow | 1 | python, jupyternotebook, tensorflow, kustomize, kubernetes | machine learning, infrastructure, cloud, kubernetes | Cloud | 2020 |
| LabLua | 7 | luarocks, pallene, céu, netbsd, lunatik, lua, elasticsearch | reactive programming, compilers, kernel scripting, reactive programming, distributed systems, programming languages, scripting languages, operating systems, scripting | Programming Languages and Development Tools | 2020 |
| Laboratory for Cosmological Data Mining | 1 | 2014 | |||
| LanguageTool | 1 | 2011 | |||
| languagetool.org | 1 | java, javascript, machinelearning, ai, tensorflow | artificial intelligence, language, edtech, education, nlp | End User Applications | 2018 |
| LEAP Encryption Access Project | 2 | gnupg, twisted, javascript, openvpn, python | mail, vpn, e2e, encryption | End User Applications | 2018 |
| Learning Unlimited | 1 | 2011 | |||
| Learning Unlimited, Inc. | 1 | 2012 | |||
| Libav | 1 | 2012 | |||
| Libre Space Foundation | 2 | embedded, arduino, django, raspberrypi, sdr, spaceapplications, python, c/c++ | cubesats, software defined radio, satellite data, web applications, space applications, spacecraft, space standards, hardware | Science and Medicine | 2020 |
| LibreHealth | 4 | android, java, webcomponents, php, mysql, python3, javascript | web apps, ictd, radiology, global health, information security, deep learning, web apps, health, medicine, mobile-apps, web | Science and Medicine | 2020 |
| LibreOffice | 10 | android, c++, java, opengl, python | android, end-user application, desktop application, big project, end user application, office suite, end user applications, cloud | End User Applications | 2020 |
| Libvirt | 5 | hypervisor, qemu, virtualization, c, lxc, kvm, xen, containers, python | container, cloud, virtualization, libraries, virtual machine, library | Cloud | 2020 |
| LimeSurvey | 3 | 2011 | |||
| Linaro | 1 | 2014 | |||
| Linkerd | 2 | rust, prometheus, golang, kubernetes, react, linkerd | service mesh, microservices, dev-ops, cloud infrastructure, kubernetes, containers, cloud native, networking, networking | Cloud | 2020 |
| Linux Trace Toolkit next generation project (LTTng) | 2 | 2014 | |||
| Liquid Galaxy Project | 9 | android, java, gis, mapsapi, nodejs, javascript, cesiumjs, vue, ros, html, python, cesium | graphics, webvr, maps, geo, data visualization, visualization, machine learning, cluster, visualisation, geospatial, virtual reality, data | Graphics / Video / Audio / Virtual Reality | 2020 |
| LLVM Compiler Infrastructure | 8 | clang, llvm | code analysis, compilers, compiler, programming languages and development tools, compiler api | Programming Languages and Development Tools | 2019 |
| lmonade: scientific software distribution | 3 | 2015 | |||
| lowRISC | 4 | chisel, c++, fpga, verilog, systemverilog, risc-v, linux, python | system-on-chip, soc, compilers, fpga, security, embedded hardware, debug, hardware, open hardware, education | Other | 2020 |
| LuaRocks | 3 | unix, luarocks, c, windows, lua, linux | games, programming languages, programming tools, package manager, package management, programming language, package managers | Programming Languages and Development Tools | 2019 |
| LXDE Project | 1 | 2010 | |||
| LyX – The Document Processor | 2 | 2014 | |||
| MacPorts | 3 | buildbot, c, python, web, tcl, scripting | macos, libraries, package management, operating systems, build tools | End User Applications | 2020 |
| Maemo Community | 2 | 2010 | |||
| Mapnik | 2 | 2011 | |||
| MariaDB | 5 | c++, java, c, mariadb, perl, mysql | database, databases | Data and Databases | 2017 |
| MariaDB Foundation | 3 | c++, java, c, mariadb, mysql | performance, sql, database, databases, distributed systems | Data and Databases | 2020 |
| Marine Biological Laboratory - Center for Library and Informatics | 1 | 2011 | |||
| Marine Biological Laboratory Biodiversity Informatics Group-Encyclopedia of Life Project | 1 | 2010 | |||
| Maryland Institute for Technology in the Humanities | 1 | 2013 | |||
| Matrix | 1 | python, javascript, rust, go, react | encryption, realtime communication, decentralised, team chat, chat | Social / Communications | 2020 |
| Matrix.org | 4 | android, postgresql, golang, nodejs, javascript, go, python, react, ios | decentralization, real time, communication, real time, decentralisation, federated, voip, communications, realtime communications, collaboration, iot, interoperability, instant messaging, real time communications, team chat | Social / Communications | 2019 |
| MBDyn | 2 | python, c++ | numerical methods, scientific computing, multibody dynamics, aeronautics, mechanics, engineering, science, aerospace, mechanical engineering, automotive | Science and Medicine | 2020 |
| MBDyn - Multibody Dynamics | 1 | python, c++, scripting | mechanical engineering, aeronautics, multibody dynamics, aerodynamics, linear algebra | Science and Medicine | 2019 |
| MBDyn, Department of Aerospace Engineering at the Polytechnic University of Milan | 1 | 2015 | |||
| MBDyn, Department of Aerospace Science and Technology at Politecnico di Milano | 1 | c++ | physics, engineering, simulation, robotics, real time | Science and Medicine | 2016 |
| McGill Space Institute | 1 | python, sql, databases, bigdata | space, astronomy | Science and Medicine | 2016 |
| MDAnalysis | 1 | python, cython, numpy, c/c++ | biophysics, computational chemistry, molecular simulation, cheminformatics, molecular dynamics | Science and Medicine | 2020 |
| Measurement Lab | 1 | 2012 | |||
| Measurement Lab (M-Lab) | 1 | 2013 | |||
| MEDES-IMPS | 1 | 2015 | |||
| Melange | 6 | 2014 | |||
| Mercurial | 1 | 2013 | |||
| Mercurial (a member of the Software Freedom Conservancy) | 1 | 2009 | |||
| Mercurial Distributed Version Control System | 1 | 2010 | |||
| MetaBrainz Foundation | 2 | postgresql, javascript, perl, python | machine learning, metadata, music, big data, books | Data and Databases | 2016 |
| MetaBrainz Foundation Inc. | 10 | postgresql, spark, solr, postgres, python, perl, bigquery, javascript, react | open data, metadata, community, music, big data, data, books | Data and Databases | 2020 |
| Metalink | 1 | 2012 | |||
| Metasploit | 3 | postgresql, asm, ruby, c, assembly, python | security, offensive security, penetration testing, exploitation | Security | 2020 |
| MGGG Redistricting Lab | 1 | python, javascript, gis, julia, mapping | web-interface, statistics, graph algorithms, mapping, civic tech | End User Applications | 2020 |
| Microkernel devroom | 1 | c, c++, rust, arm, x86 | microkernel, components, ipc, desktop, virtualization | Operating Systems | 2017 |
| Mifos | 1 | 2009 | |||
| Mifos (The Community for Open Source Microfinance) | 1 | 2013 | |||
| Mifos Initiative | 3 | android, java, mysql, spring, javascript, angularjs | fintech, mobile banking, mobile, microfinance, big data, digital financial services, financial inclusion, cloud | End User Applications | 2017 |
| MINIX 3 | 2 | 2012 | |||
| MINIX 3 Group at the VU | 1 | 2010 | |||
| MINIX 3 Research group at the Vrije Universiteit in Amsterdam, The Netherlands | 1 | 2011 | |||
| MinnowBoard Project | 1 | 2015 | |||
| MIT App Inventor | 3 | android, java, googlewebtoolkit, junit, googleappengine, javascript, gwt, javascipt, app | apps, education, mobile, programming languages and development tools, api, iot, development, mobile apps, web, blockchain, education | Programming Languages and Development Tools | 2020 |
| MIT Center for Mobile Learning @ The Media Lab | 1 | 2012 | |||
| MIT Media Lab | 2 | android, java, html/javascript | educational technology, education | End User Applications | 2016 |
| Mixxx | 2 | c++, deeplearning, qt, javascript | dj, streaming, music, music information retrieval | End User Applications | 2020 |
| Mixxx Digital DJ | 1 | 2010 | |||
| Mixxx DJ Software | 6 | real-time, hid, audio, c++, midi, music, c++11, qt, opengl | art, real time, dsp, audio, dj, beatdetection, metadata, music | Graphics / Video / Audio / Virtual Reality | 2018 |
| mlpack | 4 | c++, deeplearning, machinelearning, python, templates | data science, fast algorithms, reinforcement learning, data mining, machine learning, algorithms, deep learning, neighbor-search, optimization | Data and Databases | 2020 |
| mlpack: a scalable C++ machine learning library | 1 | c++ | machine learning, data mining, fast algorithms | Science and Medicine | 2016 |
| mlpack: scalable C++ machine learning library | 2 | 2014 | |||
| MLton.org | 1 | 2013 | |||
| Mobile Robot Programming Toolkit (MRPT) | 3 | c++, opencv, python, ros, wxwidgets, qt, opengl, c/c++, webs, cmake | real-time, ai, webapps, slam, algorithms, robotics, mobile robots, selfdriving, computer vision, robot, vision | Science and Medicine | 2018 |
| ModSecurity | 1 | waf, webapplicationfirewall | web application security | Security | 2016 |
| MoinMoin | 1 | 2011 | |||
| MoinMoin Wiki | 4 | 2013 | |||
| Moira | 2 | golang, grafana, javascript, typescript, react, graphite | sre, alerting, monitoring, devops, devops, devtools | Programming Languages and Development Tools | 2020 |
| Monkey HTTP Daemon | 1 | 2012 | |||
| Monkey Project | 2 | 2014 | |||
| Mono Project | 7 | f#, c, c#, .net | compiler, programming tools, web development, mobile development, ide | Programming Languages and Development Tools | 2017 |
| Moodle | 10 | ionic, postgresql, sql, php, jquery, mysql, angular, javascript | web applications, e-learning, web applications, education, learning management, web application, school systems, school system, education | Social / Communications | 2019 |
| MoveIt | 1 | c++, ros | robotics | Other | 2020 |
| MovingBlocks | 3 | gradle, java, json, github, opengl, blender, lwjgl | sandbox, game, games, modding, minecraft, voxel | End User Applications | 2018 |
| Mozilla | 10 | html/css, webdevelopment, js, c++, rust, html5, javascript, html, css, python, react | mozilla, open source, web browser, browser, open web, firefox, internet, information security, free software, internet freedom, web platform and services, devtools, web technologies, web, privacy/security, education | Web | 2020 |
| Mozilla Project | 1 | 2009 | |||
| MuseScore | 7 | qml, c++, midi, cpp, qt5, c++11, qt, breakpad, c/c++, cmake | music engraving, midi, piano, music, user interface, notation, sheet music, guitar, end user applications, composing, musicxml, music notation, notation software | End User Applications | 2020 |
| mypy | 1 | python | static code analysis‎, compiler | Programming Languages and Development Tools | 2020 |
| mySociety | 1 | 2012 | |||
| MySQL | 1 | 2009 | |||
| MZmine | 1 | java, javafx | mass spectrometry, molecular analysis, visualization, data processing, molecular networking | Science and Medicine | 2020 |
| Named Data Networking Project | 1 | java, android, javascript, c++14, c# | networking, informationc centric networking, ipfs | Web | 2019 |
| National Center for Supercomputing Applications | 1 | 2009 | |||
| National Evolutionary Synthesis Center | 1 | 2012 | |||
| National Evolutionary Synthesis Center (NESCent) | 2 | 2013 | |||
| National Library of the Czech Republic | 1 | 2013 | |||
| National Resource for Network Biology (GenMAPP, Cytoscape and WikiPathways) | 1 | 2011 | |||
| National Resource for Network Biology (NRNB) | 8 | c++, java, php, python, html, rest, r, javascript, c/c++, web | bioinformatics, biology, data modeling, web applications, graphics, systems biology, data visualization, scientific computing, data science, dataviz, database, network analysis, web application, network biology, ui/ux, web | Science and Medicine | 2020 |
| Native Client | 1 | 2009 | |||
| Natural User Interface Group | 3 | 2012 | |||
| Natural User Interface Group (NUI Group) | 1 | 2010 | |||
| Neovim | 3 | c, javascript, vim, rpc, lua, python | cross platform, cross-platform, vim, programming, tools, developer tools, system programming, editor, text editor | Programming Languages and Development Tools | 2020 |
| NESCent - National Evolutionary Synthesis Center | 2 | 2010 | |||
| Netfilter Project | 6 | firewall, c, linuxkernel, networking, linux, kernel | firewall, computer networking, network monitoring, network security, networking, software defined networking, linux kernel | Operating Systems | 2019 |
| NetSurf | 2 | 2014 | |||
| Netty | 1 | java, jni, c | nonblocking, network, async | Web | 2020 |
| Network Time | 1 | 2012 | |||
| Network Time Foundation | 2 | 2015 | |||
| New Visions for Public Schools | 1 | 2012 | |||
| Ninux.org | 1 | 2012 | |||
| Nmap Security Scanner | 9 | c++, c, lua, python, c/c++ | network mapping, security, ipv6, networking, linux | Security | 2017 |
| NTP | 1 | 2011 | |||
| NTP Project | 1 | 2009 | |||
| NumFOCUS | 6 | c++, r, javascript, julia, python, c/c++ | graphics, data science, data science, graphics, numerical computation, scientific computing, statistical computing, data visualization, numerical computation, machine learning, pydata, big data, numerical computing, high performance computing | Science and Medicine | 2020 |
| NV Access | 2 | c++, iaccessible2, win32api, uiautomation, python | braille, text to speech, screen reader, blindness, screen reader, text to speech, accessibility, blindness, braille | Other | 2020 |
| OAR | 2 | 2010 | |||
| OGDF - Open Graph Drawing Framework | 3 | 2014 | |||
| OGRE | 1 | 2009 | |||
| OGRE (Object-Oriented Graphics Rendering Engine) | 2 | 2013 | |||
| OGRE - Open Source 3D Graphics Engine | 1 | 2011 | |||
| omegaUp.com | 1 | php, mysql, python | cs education, education, web community | Web | 2018 |
| OMII-UK | 2 | 2010 | |||
| OncoBlocks | 1 | 2015 | |||
| Open Bioinformatics Foundation | 8 | haskell, c++, java, ruby, biojs, php, python, perl, d, javascript, c/c++ | bioinformatics, web, computational biology | Science and Medicine | 2019 |
| Open Bioinformatics Foundation (OBF) | 1 | python, javascript, c/c++ | bioinformatics, computational biology | Science and Medicine | 2020 |
| Open Chemistry | 5 | c++, java, javascript, html, opengl, webgl, python, c/c++ | graphics, data science, data science, chemistry, scientific visualization, visualization, computational chemistry, materials science, science, scientific computing, scientific visualization, cheminformatics | Science and Medicine | 2020 |
| Open Data Kit | 3 | android, java, ruby, python, javascript | social good, mobile, mobile, global health, global health, global development, global development, social good, cloud | End User Applications | 2019 |
| Open Detection | 2 | c++, pcl, opencv, caffe, c/c++, cmake | machine learning, ai, computer vision | Other | 2017 |
| Open Education Resource Foundation | 1 | 2014 | |||
| Open Ephys | 1 | c++, juce | neuroscience, electrophysiology, visualization, ui, signal processing | Science and Medicine | 2016 |
| Open Food Facts | 1 | perl, mongodb, ios, android, machinelearning | computer vision, crowdsourcing, open data, food, health | Science and Medicine | 2018 |
| Open Genome Informatics | 3 | r-project, java, neo4j, nodejs, python, react, javascript, gwt, html/javascript | bioinformatics, biology, genomics, data and databases, data mining, genome, data visualisation, databases, bioinformatics, computational biology | Science and Medicine | 2020 |
| Open Lighting Project | 3 | 2014 | |||
| Open Motion Planning Library | 1 | 2014 | |||
| Open Networking Lab | 1 | 2013 | |||
| Open Roberta | 2 | java, javascript | education, robotics, robotics, web, web, visual programming, education | Programming Languages and Development Tools | 2020 |
| Open Roberta Lab | 1 | java, javascript | education, programming, robotics | Web | 2018 |
| Open Source Computer Vision Library | 1 | 2010 | |||
| Open Source Computer Vision Library (OpenCV) | 5 | 2015 | |||
| Open Source Robotics Foundation | 7 | gazebo, c++, javascript, ros, python, c/c++ | robotics, middleware, simulation | Programming Languages and Development Tools | 2020 |
| Open States | 2 | postgresql, javascript, django, graphql, python, react | civic tech, journalism, scraping, government, civic, web | Other | 2018 |
| Open Technologies Aliance - GFOSS | 1 | python, javascript, gtk, qt, arduino | robotics, programming languages, open education, c- c+, java | Programming Languages and Development Tools | 2019 |
| Open Technologies Alliance - GFOSS | 1 | php, java, mysql, virtuoso, python | data, cloud, hardware | Other | 2017 |
| Open64 | 1 | 2009 | |||
| OpenAFS | 2 | 2010 | |||
| OpenAstronomy | 5 | c++, spark, numba, numpy, c, javascript, qt, julia, python | data science, high-energy astrophysics, astronomy, atomic physics, visualization, solar physics, visualisation, orbital mechanics, science, cloud infrastructure, astrophysics, high energy astrophysics | Science and Medicine | 2020 |
| Opencast Matterhorn | 1 | 2012 | |||
| OpenCensus | 1 | python, java, ruby, node, go | tracing, monitoring, c++, php | Cloud | 2018 |
| OpenChange (a project of the Free Software Conservancy) | 1 | 2009 | |||
| OpenCog Foundation | 1 | 2012 | |||
| OpenCog sponsored by the Singularity Institute for Artificial Intelligence | 1 | 2009 | |||
| OpenCV | 4 | c++, deeplearning, machinelearning, javascript, cuda, computervision, vision, python3, python, c/c++ | graphics, real time, virtual reality, real time, machine learning, robotics, robotics, deep learning, computer vision, virtual reality, vision, deep learning | Graphics / Video / Audio / Virtual Reality | 2020 |
| OPeNDAP, Inc. | 1 | 2010 | |||
| OpenEMR | 1 | php, mysql, javascript, docker, html | medical records, health, cloud, medicine, medical practice management solution | Science and Medicine | 2020 |
| OpenFlowHub | 1 | 2012 | |||
| OpenHMD | 1 | c99, opengl, vulkan, opencv, libusb | virtual reality, xr, drivers, reverse engineering, computer vision | Graphics / Video / Audio / Virtual Reality | 2020 |
| OpenICC | 3 | 2012 | |||
| OpenICC Color Management | 1 | 2011 | |||
| OpenImageIO | 4 | 2012 | |||
| OpenInkpot project | 1 | 2010 | |||
| OpenIntents | 2 | 2012 | |||
| OpenKeychain (OpenPGP for Android) | 3 | android, openpgp | security, e-mail, encryption | Security | 2016 |
| OpenMined | 1 | deeplearning, federatedlearning, homomorphicencryption, securemulti-partycomputation, differentialprivacy | privacy, artificial intelligence | Other | 2020 |
| OpenMRS | 12 | html/css, android, html5, java, hibernate, rest, groovy, mysql, spring, javascript, xml | science and medicine, open source, hospitals, clinics, open source medical records, medical records, developing countries, health, developing countries, developing world, medical record, ehealth, clinical | Science and Medicine | 2020 |
| OpenNebula | 1 | 2010 | |||
| OpenNMS | 3 | 2013 | |||
| OpenRefine | 1 | java, javascript | real-time, data visualization, data integration, web application | Data and Databases | 2020 |
| OpenSIPS | 1 | c, python, mysql, scripting | voip, telephony, real-time-communications, sip | Social / Communications | 2018 |
| OpenSSH | 1 | 2009 | |||
| OpenStreetMap | 10 | docker, java, ruby, sql, postgis, python, opengl, javascript, c/c++ | maps, gis, crowdsourcing, open data, geoinformatics, maps, geoinformatics, crowdsourcing | Data and Databases | 2020 |
| openSUSE | 6 | angular.js, rubyonrail, c/c++, docker, ruby, rubyonrails, perl, linux, javascript, angularjs, html/javascript | packaging, linux, virtualization, qa, ui/ux, linux distribution, configuration management, realtime, web, web development, conferences | Operating Systems | 2018 |
| openSUSE Project | 3 | rpm, javascript, perl, linux, python | software quality, containers, tools, operating systems, build tools | Operating Systems | 2020 |
| Openwall | 3 | 2015 | |||
| Openwall Project | 1 | 2011 | |||
| OpenWISP | 4 | linux, javascript, django, raspberrypi, lua, openwrt, ansible, python | mesh-networks, telecommunications, wireless, configu, wireless networks, network automation, configuration management, iot, networking, network visualization, web development, wifi, telecom, networking, web | Web | 2020 |
| OpnTec | 1 | python, javascript, emberjs, cloud, android | open event, event solutions, web | Social / Communications | 2018 |
| Oppia Foundation | 5 | webpack, javascript, kotlin, css, appengine, googleappengine, angular, python, angularjs | interactive, interactive, tools, community, tools, educational technology, web development, web, web, community, education | Web | 2020 |
| Opticks | 1 | 2010 | |||
| Orange – Data Mining Fruitful & Fun | 3 | machinelearning, cython, qt, python | bioinformatics, data mining, machine learning, visualization, gui toolkit | Science and Medicine | 2016 |
| Orcasound | 1 | elixir, react, javascript, python, raspberrypi | real-time, audio, citizen science, machine learning, web application | Science and Medicine | 2020 |
| Oregon State University Open Source Lab | 2 | 2010 | |||
| Oregon State University Open Source Lab (OSUOSL) | 5 | 2015 | |||
| OSGeo | 4 | c++, java, opensourcedatabases, c, sql, database, standards, python, c/c++ | open science, maps, mapping, geolocation, gis, geolocation, mapping, geoinformatics, maps, geospatial, science, cartography, geospatial, open science, computer vision, citizen science | Other | 2020 |
| OSGeo - Open Source Geospatial Foundation | 7 | 2015 | |||
| OSGeo - The Open Source Geospatial Foundation | 1 | python, sql, c, ogcstandards, c++ | gis, science, maps, cartography, geospatial | 2016 | |
| OSU Open Source Lab | 1 | python, rest, javascript, ruby | virtualization, infrastructure | 2016 | |
| OSv | 1 | 2014 | |||
| oVirt | 2 | kvm, python, java | enterprise application, virtualization | End User Applications | 2017 |
| OW2 | 1 | java, perl, middleware, bpm, wiki | enterprise information systems, cloud, security, middleware | Other | 2018 |
| OWASP | 1 | 2013 | |||
| OWASP Foundation | 6 | .net, java, ruby, php, python, html, net, node.js, javascript | appsec, application security, cloud security, web application security, secure development, security, sdlc, information security, mobile security, cyber security | Security | 2020 |
| ownCloud | 2 | android, sql, php, html, css, qt, javascript, ios | sync, data sharing, file share, cloud, synchronized, web | Cloud | 2017 |
| P2PSP.org | 4 | android, c++, qt, javascript, sockets, webrtc, python, c/c++, ios | real time, video, streaming, security, live streaming, networking, p2p, multimedia, distributed networks | Graphics / Video / Audio / Virtual Reality | 2018 |
| PacketFence | 1 | 2012 | |||
| PaGMO / PyGMO | 1 | 2013 | |||
| PaGMO / PyKEP | 1 | 2015 | |||
| Pardus | 2 | 2010 | |||
| Parrot Foundation | 3 | 2013 | |||
| PEcAn Project | 4 | docker, postgresql, c, php, javascript, singularity, kubernetes, r, python | data science, ecological forecasting, data science, climate science, scientific visualization, climate science, ecosystem models, scientific visualization | Science and Medicine | 2020 |
| Pencil Code Foundation | 1 | 2015 | |||
| Peragro | 1 | python, blender, javascript, celery, django | analyzing, transcoding, pipeline automation, games, web | 2016 | |
| Percona | 2 | postgresql, prometheus, golang, grafana, mysql, shellscript, selenium, javascript | load testing, testing, data visualization, monitoring, metrics, alerts, automation, databases, database optimization | Data and Databases | 2020 |
| Performance Co-Pilot | 5 | java, golang, ruby, c, javascript, grafana, libuv, windows, linuxkernel, rest, redis, linux, python | performance, data analysis, analysis, visualization, web development, distributed, monitoring, lightweight, realtime messaging, timeseries, web development, high performance computing, kernel | Operating Systems | 2020 |
| Pharo Consortium | 2 | squeak, roassal, smalltalk, os, pharo, polymath, ide | data science, object oriented programming, nlp, cli, dynamic environment, user interface, material design, web development, ide | Programming Languages and Development Tools | 2019 |
| PHP | 1 | 2009 | |||
| phpBB Forum Software | 5 | php, html5/css3, symfony, css, mysql, javascript | communication, forum, collaboration, social, community | Social / Communications | 2018 |
| phpMyAdmin | 9 | bootstrap, php, jquery, mysql, javascript, cakephp | web applications, database, web application, administrator, mysql, developer | Data and Databases | 2019 |
| Physical Web Project | 2 | bluetooth, internetofthings, arduino, physicalweb, beacons, webbluetooth, python, beacon | mobile, web apps, beacons, internet of things | Other | 2017 |
| Pidgin, Finch and libpurple | 5 | 2015 | |||
| Pitivi | 2 | python3, gstreamer, gtk, c | video editing, video editing, video processing, video processing, filmmaking | Graphics / Video / Audio / Virtual Reality | 2020 |
| PiTiVi video editor | 1 | 2013 | |||
| PKIF project | 1 | 2009 | |||
| Plan 9 from Bell Labs | 5 | 2014 | |||
| PLASMA @ UMass | 3 | scala, go, javascript, c/c++ | software engineering, programming languages, programming tools, runtime systems, operating systems | Programming Languages and Development Tools | 2016 |
| Plone | 1 | python, javascript, html, css, reactjs | communications, collaboration, content management, web | Web | 2018 |
| Plone Foundation | 7 | html/css, nosql, zope, python, rest, javascript | enterprise applications, content management, cms, content management | Web | 2017 |
| PLSE at UW | 1 | 2010 | |||
| PMD | 2 | javacc, java, xpath, antlr, xml | code analysis, code quality, source code analyzer, linter | Programming Languages and Development Tools | 2018 |
| Pocket Science Lab | 1 | android, java, firmware, c, cad | science, education, firmware, school apps | Science and Medicine | 2018 |
| Point Cloud Library | 1 | cpp, cmake, devops | 3d computer vision, robotics, perception | Graphics / Video / Audio / Virtual Reality | 2020 |
| Point Cloud Library (PCL) | 3 | 2014 | |||
| Polly Labs | 2 | isl, polly, llvm, pencil, c/c++, ppcg, integersetlibrary | parallelization, polyhedral compilation, compilers, polyhedral model, fpga, program verification, optimization | Programming Languages and Development Tools | 2018 |
| Portable Native Client | 1 | 2015 | |||
| Portland State University | 9 | language-agnostic, openhardware | academic projects, new projects, individual projects | Other | 2017 |
| PostgreSQL | 5 | postgresql, sql, c, postgres, ordbms, rdbms, perl | sql, database, rdbms, big data, data management, data | Data and Databases | 2020 |
| PostgreSQL Global Development Group | 1 | 2011 | |||
| PostgreSQL Project | 4 | 2015 | |||
| Postman | 1 | node.js, javascript | api management, developer tools, api, programmer productivity | Programming Languages and Development Tools | 2020 |
| Princeton Center for Information Technology Policy | 1 | 2010 | |||
| PRISM Model Checker | 3 | java, c++ | verification, probabilistic models, science | Science and Medicine | 2016 |
| Privly Foundation | 1 | 2015 | |||
| Probot | 1 | javascript, node, github | bot, automation, development tools | Programming Languages and Development Tools | 2018 |
| Processing | 3 | 2013 | |||
| Processing Foundation | 1 | python, android, opengl, java, javascript | creative coding, graphics, web, education, design | Programming Languages and Development Tools | 2020 |
| Project PANOPTES | 1 | python3, arduino, cloud | astronomy, robotics, exoplanet, image processing | Science and Medicine | 2019 |
| Project Tox | 1 | 2014 | |||
| Ptolemy Project, University of California, Berkeley | 1 | 2009 | |||
| Public Lab | 4 | node.js, leaflet, ruby, rubyonrails, raspberrypi, webrtc, javascript | pollution, hardware, collaboration, science, environment, community | Science and Medicine | 2019 |
| Public Laboratory for Open Technology and Science | 2 | 2014 | |||
| PulseAudio | 2 | 2013 | |||
| Puppet (Reductive Labs) | 1 | 2010 | |||
| Puppet Labs | 1 | 2012 | |||
| Purr Data | 3 | html5, html5/css3, svg, opengl, node.js, javascript, c/c++ | real-time, data vizualisation, dsp, digital signal processing, audio, data visualization, video, music, real-time system, 2d/3d graphics, visual programming | Graphics / Video / Audio / Virtual Reality | 2020 |
| Python HYDRA | 1 | python, rdf, flask, hydra, json/json-ld | apis, database, functional-programming, semantic web, knowledge graph | Web | 2018 |
| Python Software Foundation | 12 | python, mercurial | ui design, biology, physics, machine learning, mathematics, hardware, image analysis, programming languages, security, science, science | Programming Languages and Development Tools | 2020 |
| QEMU | 7 | assembly, rust, virtualization, c, kvm, linux, python | lowlevel, hypervisor, compilers, virtualization, compiler, code generation, emulation, operating systems, kernel, cloud, emulator | Cloud | 2020 |
| QEMU development team | 1 | 2010 | |||
| QEMU.org | 2 | 2013 | |||
| Quagga @ OpenSourceRouting / ISC | 1 | 2013 | |||
| Qubes OS | 2 | shell, c, xen, linux, python | privacy, virtualization, security, operating systems, operating system | Operating Systems | 2020 |
| Quill.org | 1 | ruby, rails, react, javascript, postgresql | education, edtech, machine learning, nlp, web | Web | 2018 |
| R Foundation for Statistical Computing | 1 | 2009 | |||
| R Project for Statistical Computing | 11 | r-project, c++, c, fortran, r, javascript | graphics, data science, graphics, data visualization, visualization, machine learning, statistics | Programming Languages and Development Tools | 2020 |
| radare | 3 | c++, rust, c, cpp, go, qt, python | debugging, security, decompilation, disassembly, reverse engineering, program analysis, assembly | Security | 2020 |
| radare2 | 1 | c, rust, python, nodejs | reverse engineering | Security | 2017 |
| Raxa | 3 | 2014 | |||
| ReactOS | 6 | c++, c, php, nt, win32, c/c++ | drivers, windows, applications, operating systems, desktop, web services, kernel | Operating Systems | 2020 |
| Read the Docs | 2 | documentation, javascript, django, sphinx, elasticsearch, python | docs, documentation, communications, web | Programming Languages and Development Tools | 2019 |
| Red Hen Lab | 6 | audioprocessing, nlp, datascience, machinelearning, opencv, scikit-learn, multimodalanalysis, tensorflow, asr, singularity, syntaxnet, python, highperformancecomputing, audioprocesing | data science, ai, audio processing, communication, big data visualization, machine learning, cognitive science, big data, artificial intelligence, deep learning, video processing, co-speech gesture, natural language processing, multimedia | Science and Medicine | 2020 |
| Review Board | 4 | 2012 | |||
| RIOT | 1 | 2015 | |||
| RoboComp | 7 | c++, opencv, openscenegraph, ice-zeroc, zerocice, component-baseddevelopment, c++11, qt, python, c/c++, gnu/linux, cmake | simulation, robotics, robotics, component-based development, robotics simulation, framework, computer vision, multi-agent system, multi-agent system, component-based development, computer vision | Other | 2020 |
| Rockbox | 3 | 2011 | |||
| Rocket.Chat | 4 | android, node, webrtc, ruby, meteor.js, mongo, chatbots, node.js, reactnative, javascript, react, ios | progressive web apps, chat, chatops, bot, communication, machine learning, social-network, chatbot, realtime communications, collaboration, instant messaging, realtime, team chat | Social / Communications | 2020 |
| RooStats | 1 | 2012 | |||
| RouteFlow | 3 | 2015 | |||
| Rspamd | 2 | machinelearning, c, lua, javascript, cmake | email, machine learning, spam filtering, high performance computing | Security | 2018 |
| Rspamd spam filtering system | 1 | 2015 | |||
| RTEMS Project | 12 | embeddedsystems, posix, c, waf, assembly, python, c/c++, bsdunix | posix, real time, kernel, iot cps, embedded systems, multicore, multicore, iot, operating system, embedded systems, kernel | Operating Systems | 2020 |
| Ruby | 5 | java, ruby, c | web servers, programming languages, web servers, programming language, developer tools, developer tools, cloud | Programming Languages and Development Tools | 2020 |
| Ruby on Rails | 6 | ruby, rubyonrails, html | web development, web applications, full stack, web | Web | 2018 |
| Ruby Science Foundation | 6 | ai, c++, machinelearning, ruby, c, gpu, cuda, cprogramming, science, jruby, c/c++, data, web | data science, scientific computing, compilers, math, visualization, data-science, hpc, space, linear algebra, parallel algorithms, artificial intelligence, science, package management, scientific visualization, data, web | Science and Medicine | 2019 |
| Ruby Science Foundation (SciRuby) | 1 | 2014 | |||
| Sage Mathematical Software System | 7 | c++, c, cython, javascript, python3, python, c/c++ | mathematical software, math, combinatorics, mathematics, algorithms, toolbox, science | Science and Medicine | 2018 |
| SageMath | 2 | python, cython | math, math, education, mathematics, education, research, research | Science and Medicine | 2020 |
| Sahana | 1 | 2009 | |||
| Sahana Software Foundation | 5 | 2014 | |||
| Sakai Foundation | 2 | 2010 | |||
| Sakai Project | 2 | 2012 | |||
| Salesforce | 1 | scala, apachespark, javascript, nodejs, react | machine learning, natural language processing, web applications, user interface, cli | Cloud | 2019 |
| Samba | 9 | python, c, cifs, smb | networks, interoperability, samba, networking, networking | Data and Databases | 2020 |
| Saros | 1 | 2015 | |||
| Scaffold Hunter | 2 | 2014 | |||
| Scala | 3 | scala, llvm, jvm | compilers, functional-programming, compiler, programming languages, programming tools, programming-tools, programming-language, functional programming | Programming Languages and Development Tools | 2018 |
| Scala Team | 4 | 2015 | |||
| Scilab | 4 | scilab, c++, java, c, python, opengl | graphics, scientific visualization, numerical computation, mathematics, numerical computing, science, programming language | End User Applications | 2018 |
| Scilab Consortium/Digiteo Foundation | 1 | 2010 | |||
| Scilab Enterprises | 2 | scilab, c++, java, c, fortran | graphics, user interface, mechanics, engineering, vision | Science and Medicine | 2016 |
| Scilab/Digiteo Foundation | 1 | 2009 | |||
| SCons next-generation build system | 1 | 2009 | |||
| SCoRe Lab | 1 | python, mobile, cloud, webdevelopment, machinelearning | information security, mobile, cloud, web development, machine learning | End User Applications | 2020 |
| SCoRe Lab (Sustainable Computing Research Lab) | 1 | python, nodejs, android, golang | information security, mobile, cloud, web development, machine learning | Security | 2019 |
| Scribus | 1 | 2012 | |||
| Scribus Team | 2 | 2011 | |||
| ScummVM | 11 | c++, sdl, lua, assembly, opengl, c/c++ | game, games, software archeology, game engines, software archeology, game engines, software preservation, software preservation, engines | End User Applications | 2020 |
| Seastar | 1 | cpp, framework, dpdk, tcp, linux | high performance, tcp, app development, network, framework | Programming Languages and Development Tools | 2018 |
| Selenium | 2 | 2011 | |||
| Sencha Labs | 1 | 2011 | |||
| SETI Institute | 1 | 2011 | |||
| SharpDevelop | 2 | 2010 | |||
| Shogun | 1 | python, c++, datascience, machinelearning, matlab | machine learning, scientific computing, software engineering, user experience, data science | Science and Medicine | 2020 |
| Shogun Machine Learning Toolbox | 5 | c++, machinelearning, swig, python, c/c++, cmake | bioinformatics, fast algorithms, software engineering, machine learning, software engineering, statistics, bioinformatics, fast algorithms, statistics | Science and Medicine | 2017 |
| Shogun Machine Learning Toolbox (Technical University Berlin / Max Planck Campus Tübingen) | 1 | 2011 | |||
| shogun.ml | 1 | c++11, c++17, python, swig, cmake | machine learning, scientific computing, software engineering, user experience, data science | Science and Medicine | 2019 |
| Sigmah | 5 | java, gwt, postgresql | hfoss, project-management, humanitarian | End User Applications | 2017 |
| SilverStripe | 1 | 2012 | |||
| Simple DirectMedia Layer | 4 | 2013 | |||
| SimpleCV | 2 | 2013 | |||
| SIP Communicator | 2 | 2010 | |||
| Software and Computational Systems Lab at LMU Munich | 2 | java, python, javascript | software verification, software analysis, result presentation, benchmarking, smt solver | Programming Languages and Development Tools | 2019 |
| Software Freedom Conservancy, Inc. | 1 | 2014 | |||
| Software Heritage | 1 | python, javascript, postgres, django, git | digital preservation, source code archive, free and open source software, big data, big code | Data and Databases | 2019 |
| Software Product Data Exchange (SPDX) | 1 | rdf, python, java, github, c | compliance, opensource, licensing | Programming Languages and Development Tools | 2017 |
| Soletta Project | 1 | c, python, javascript, networking, machinelearning | internet of things, portable, robotics, drones, makers | Programming Languages and Development Tools | 2016 |
| Space @ Virginia Tech | 1 | python, javascript, d3, mysql, mongodb | real time, web, data visualization, data analytics | Science and Medicine | 2018 |
| SPDX | 2 | rdf, java, golang, json, node.js, python, xml | licensing, compliance, open source | Other | 2020 |
| SPDX (Software Product Data Exchange) | 1 | python, java, golang, xml | open source, compliance, licensing | Programming Languages and Development Tools | 2019 |
| Statistics Online Computational Resource | 1 | 2012 | |||
| StatusNet | 2 | 2011 | |||
| STE AR Group | 3 | parallelalgorithms, hpx, c++, opencv, c++17parallelstl, cpp, cuda, boost, python, hpc | asynchronous many task systems, parallel computing, distributed datastructures, machine learning, algorithms, c++ standardizaion, parallel algorithms, deep learning, runtime systems, asynchronous manytask systems, high performance computing, hpc | Programming Languages and Development Tools | 2020 |
| Steel Bank Common Lisp | 2 | 2014 | |||
| Stellarium | 1 | 2012 | |||
| Stemformatics | 1 | python, javascript, postgresql | web applications, cloud, bioinformatics | Science and Medicine | 2018 |
| Stony Brook University Biomedical Informatics | 3 | bioinformatics, apachespark, c++, hadoop, javascript, matlab, bigdata, medicalimaging, python | biomedical informatics, database, bioinformtics, biomedical data science, big data, deep learning, genomics, imaging, cancer informatics, medical imaging | Science and Medicine | 2018 |
| strace | 7 | make, shell, c, awk, shellscript, linux, git | syscall, debugging, tracing, c, diagnostic, linux, git | Operating Systems | 2020 |
| Stratosphere Project | 1 | 2014 | |||
| Streetmix | 1 | javascript, react, redux, postgresql, mongodb | smart cities, web, civic tech | End User Applications | 2018 |
| Submitty | 3 | c++, postgresql, web/html/css, php, python, php/javascript/ajax, databases, javascript | data visualization, communication, visualization, education, privacy/security, web | Other | 2020 |
| Subsurface | 2 | 2015 | |||
| Subversion | 1 | 2009 | |||
| Sugar Labs | 9 | android, gtk, c, python, gtk+, javascript, pygame | games, user interface, programming, media, learning, stem, education | End User Applications | 2020 |
| Sugar Labs educational platform (a member of the SFC) | 1 | 2009 | |||
| Sunlight Foundation | 1 | 2009 | |||
| Sunlight Labs | 2 | 2011 | |||
| SuperTuxKart | 2 | 2014 | |||
| Sustainable Computing Research Group ( SCoRe ) | 4 | android, node, java, golang, hadoop, gcp, go, golan, python, pyth | machine learning, mobile, cloud with google computer engine, security, forensic, embedded systems, iot, mobile applications, web | Web | 2018 |
| Swathanthra Malayalam Computing | 2 | 2014 | |||
| Swift | 3 | cmake, compilers, c++, llvm, swift, programminglanguages, server, ios | compilers, programming, programming languages, developer tools | Programming Languages and Development Tools | 2020 |
| SWIG | 2 | 2012 | |||
| SymbiFlow | 2 | fpga, verilog, xilinx, python, c/c++ | fpga, programming languages and development tools, electronic design tools | Programming Languages and Development Tools | 2020 |
| SymPy | 9 | python, c++ | math, physics, mathematics, science, symbolic mathematics, science, computer algebra | Science and Medicine | 2020 |
| SyncDiff(erent) | 1 | 2014 | |||
| Synfig | 2 | gtk, gtkmm, python, c++ | animation, 2d/3d graphics, vector graphics | Graphics / Video / Audio / Virtual Reality | 2020 |
| syslog-ng | 2 | kafka, c, sql, rest, json, elasticsearch, python | data processing pipeline, cloud, reliable log transfer, logging, high performance data processing, log management, build tools | Other | 2020 |
| Systers | 1 | 2012 | |||
| Systers Community | 1 | ios, android, python, rubyonrails, javascript | mobile applications, web apps, community | Other | 2018 |
| Systers, an Anita Borg Institute Community | 5 | android, java, rubyonrails, javascript, mysql, python, ios | games, systers, women in tech, mobile, peace corps, women in open source, web | Other | 2017 |
| Systers: Women in Computing | 2 | 2010 | |||
| Tahoe-LAFS | 1 | 2010 | |||
| TARDIS SN | 3 | python, c, cython | supernova, monte carlo methods, radiative transfer, astronomy, science, global optimization | Science and Medicine | 2020 |
| Tcl Community Association | 1 | 2009 | |||
| Tcl/Tk Community | 2 | 2011 | |||
| TEAMMATES @ National University of Singapore | 4 | java, javaee, html, appengine, css, googleappengine, javascript | web applications, teaching, software as a service, webapps, learning management, peer feedback, web development, cloud, education, saas | Web | 2018 |
| TEAMMATES Project @ National University of Singapore | 1 | 2014 | |||
| TensorFlow | 2 | deeplearning, machinelearning, dataanalysis, python, c/c++ | data science, machine learning, deep learning, python, data | Other | 2020 |
| The Apache Software Foundation | 3 | java, c/c++, c++ | big data, big data, cloud, libraries | Programming Languages and Development Tools | 2020 |
| The Apertium Project | 2 | c++, perl, python, finite-statetechnologies, xml | computer-aided translation, machine translation, morphological analysis, natural language processing, human language technologies | Social / Communications | 2016 |
| The Aqsis Team | 1 | 2009 | |||
| The Asterisk Project | 2 | 2010 | |||
| The Battle for Wesnoth | 1 | 2011 | |||
| The Center for Connected Learning and Computer-Based Modeling | 4 | html5, java, scala, html5/css3, css, javascript | simulation, academic research, education, programming languages, science, programming language, education, research, research | Programming Languages and Development Tools | 2019 |
| The Centre for Computational Medicine | 1 | 2013 | |||
| The CGAL Project | 3 | github, git, c++ | mesh processing, geometry processing, triangulaton, computational geometry, arrangement | Science and Medicine | 2017 |
| The Codehaus | 3 | 2011 | |||
| The Concord Consortium | 4 | 2015 | |||
| The Eclipse Foundation | 9 | geo, che, java, php, xtext, jakarta, iot, openj9, javascript, c/c++, ide | developer tools, locationtech, ide, runtimes, frameworks, industry, runtime systems, internet of things, iot, cloud, research | Programming Languages and Development Tools | 2019 |
| The Electronic Frontier Foundation/The Tor Project | 1 | 2009 | |||
| The Enlightenment Project | 1 | 2009 | |||
| The Fedora Project | 5 | 2015 | |||
| The FreeBSD Project | 2 | 2010 | |||
| The Freenet Project | 1 | 2009 | |||
| The FreeType Project | 1 | fonts, opentype, c, library | fonts, opentype, rendering, graphics, truetype | Graphics / Video / Audio / Virtual Reality | 2017 |
| The Gambit Project | 2 | 2012 | |||
| The Globus Alliance | 3 | 2011 | |||
| The GNU Project | 4 | android, scheme, c, javascript, python, c/c++, operatingsystems, guile | astronomy, http, gnu, operating systems, free software, reverse engineering, operating system, package managers | Operating Systems | 2020 |
| The Honeynet Project | 11 | android, honeypots, networkstack, honeypot, golang, machinelearning, python, go, dataanalysis, networking, python3, linux, javascript, c/c++, html/javascript | deception, honeypots, honeypot, sandbox, malware, security, honeynets, networking, honeynet, web development, research | Security | 2020 |
| The Java Pathfinder Team | 8 | android, javajava, java, jvm, distributedsystems, bytecode | symbolic execution, model checking, environment generation, testing , testing, formal methods, symbolic execution, verification of concurrent systems, concurrency, test input generation, program analysis , model checking, test input generation, verification , software model checking, program analysis, virtual machine | Programming Languages and Development Tools | 2020 |
| The Julia Language | 5 | c++, atom, llvm, c, julialang, julia, javascript, c/c++, gpu | graphics, data science, scientific computing, numerical computation, machine learning, linear algebra, statistics, numerical computing, integrated development environments, plotting, technical computing, high performance computing | Programming Languages and Development Tools | 2020 |
| The Libreswan Project | 4 | qemu, nss, virtualization, c, shellscript, python, web | ipsec vpn, vpn, ikev2, encryption, ipsec, ike | Security | 2020 |
| The Linux Foundation | 11 | c++, gtk, c, cups, mysql, ipp, python | lsb, wireless, wireguard, printing, spdx, kernel, automotive | Operating Systems | 2020 |
| The LLVM Compiler Infrastructure | 4 | mlir, c++, llvm, c, clang | backend, code analysis, compilers, static code analysis, compiler, programming languages and development tools, optimization, frontend, debuggers | Programming Languages and Development Tools | 2020 |
| The MacPorts Project | 7 | make, vue.js, frontend, react.js, tcl, git, html/javascript | macos, package manager, command line, mac os x, build tools | End User Applications | 2018 |
| The Mifos Initiative | 3 | android, java, mysql, spring, angular, angularjs | fintech, ai, mobile banking, microfinance, digital financial services, big data, financial inclusion, cloud, web | End User Applications | 2020 |
| The Monarch Initiative | 1 | semanticweb, javascript, textmining, namedentityrecognition, ontologies | embeddable widget, rare disease, data refinement | End User Applications | 2016 |
| The Mono Project | 1 | 2010 | |||
| The NetBSD Foundation | 9 | make, virtualization, filesystems, mips, security, c, bsdmake, cprogramming, networking, networkstack, arm, bsd, kernel | unix, packaging, general purpose os, userland, package system, real unix, free and open source software, package management, operating systems, bsd, kernel | Operating Systems | 2020 |
| The NetBSD Project | 1 | 2009 | |||
| The ns-3 Network Simulator Project | 10 | python, c/c++, c++ | simulation, computer networking, network simulation, research and development, networking, networking, research | Other | 2020 |
| The NTP Forum | 1 | 2010 | |||
| The Open Motion Planning Library | 1 | 2013 | |||
| The OpenBSD Foundation | 2 | 2015 | |||
| The OpenCog Foundation | 2 | 2015 | |||
| The OpenStack Foundation | 1 | 2014 | |||
| The Outercurve Foundation | 1 | 2012 | |||
| The Perl Foundation | 5 | c, perl, perl6, perl5, regularexpressions | concurrency, programming languages and development tools, natural language understanding, functional programming, web services | Programming Languages and Development Tools | 2019 |
| The Postgres Operator | 1 | postgresql, kubernetes, golang, operator, patroni | cloud, cloud native, databases, database services, cloud databases | Data and Databases | 2019 |
| The Privly Foundation | 2 | 2014 | |||
| The Processing Foundation | 5 | android, java, python, opengl, javascript | graphics, graphics, design, education, creative coding, design, education, web, web | Programming Languages and Development Tools | 2019 |
| The Qt Project | 1 | c++11, cpp, qt, qml, opengl | graphics, gis, maps, declarative language | Programming Languages and Development Tools | 2018 |
| The STE AR Group | 3 | c++, cuda, opencl, highperformancecomputing, parallelprocessing | parallel computing, hpx, runtime systems, high performance computing, gpu | Programming Languages and Development Tools | 2016 |
| The Syslinux Project | 1 | 2009 | |||
| The syslog-ng project | 4 | rust, java, c, rest, bigdata, elasticsearch, python, c/c++ | log management, data extraction, logging, continuous delivery, message queue, python, message correlation | Security | 2018 |
| The Terasology Foundation | 2 | gradle, java, lwgjl, opengl, blender, lwjgl | graphics, sandbox, game, ai, games, modding, minecraft, voxel | End User Applications | 2020 |
| The Tor Project | 1 | c, javascript, golang, python, browserextensions | privacy, security, anonymity, anti-censorship, research | Security | 2016 |
| The Tor Project and EFF | 1 | 2014 | |||
| The Tor Project/Electronic Frontier Foundation | 1 | 2010 | |||
| The Vega Project at the University of Washington | 1 | typescript, d3, vega, vega-lite, react | visualization, data-science | Web | 2019 |
| The Vega Visualization Tools by the UW Interactive Data Lab | 1 | javascript, typescript, react, d3.js | data visualization, visualization grammar, data science, declarative language, plotting tools | Data and Databases | 2018 |
| The Visualization Toolkit | 1 | 2015 | |||
| The Wine Project | 9 | directx, c, win32, vulkan, opengl, x11 | directx, desktop integration, 3d, 3d, directx, desktop integration, vulkan, opengl, opengl, compatibility | Other | 2020 |
| The Wiselib | 3 | 2014 | |||
| Theoretical Biophysics @ Humboldt University | 1 | 2011 | |||
| ThinkUp | 2 | 2014 | |||
| Thousand Parsec | 2 | 2010 | |||
| Tianocore | 2 | 2012 | |||
| TikiWiki CMS/Groupware | 1 | 2009 | |||
| Tiled | 1 | qt, c++, git, github | edit, editing, level, game, game development | End User Applications | 2017 |
| Timelab Technologies Ltd. | 1 | python, javascript | astronomy, algorithm prototyping/visualization, mathematics, time series | End User Applications | 2016 |
| TimVideos | 1 | python, verilog, fpga, vhdl, c | hardware, embedded, video, fpga | Graphics / Video / Audio / Virtual Reality | 2017 |
| TimVideos.us | 5 | vhdl, c, fpga, verilog, python | video, embedded, fpga, hardware, embedded hardware, live streaming, video capture | Graphics / Video / Audio / Virtual Reality | 2019 |
| TLA+ | 1 | java, tla+, eclipse, ocaml, smt | formal methods, algorithms | Programming Languages and Development Tools | 2018 |
| Tokio | 1 | tokio_rs, rust | rust, networking, windows, concurrency | Programming Languages and Development Tools | 2019 |
| Tor | 2 | c++, c, javascript, python | privacy, counter-censorship, anonymity, free-speech | Security | 2017 |
| Tox | 1 | 2015 | |||
| Tungsten Fabric | 1 | linux, kubernetes, python, networking, c/c++ | software defined networking, routing, security, multicloud | Cloud | 2019 |
| TurboGears | 1 | 2009 | |||
| Tux4Kids | 5 | 2015 | |||
| 3 | 2014 | ||||
| TYPO3 Association | 5 | 2014 | |||
| Ubuntu | 1 | 2010 | |||
| UCSC Xena | 3 | clojure, d3, javascript, jvm, python, react | bioinformatics, web applications, data visualization, cancer research, cancer, web application, genomics, bioinformatics, scientific visualization | Science and Medicine | 2019 |
| Umit Project | 3 | 2012 | |||
| Unitex/GramLab | 1 | java, c++ | natural language processing, local grammars, finite state automata, corpus annotation, multilingual language resources | Programming Languages and Development Tools | 2016 |
| Universal Subtitles | 1 | 2011 | |||
| University of Nebraska - Helikar Lab | 1 | 2015 | |||
| Unknown Horizons | 1 | 2011 | |||
| Unknown Horizons and FIFE | 1 | 2012 | |||
| Urban Energy Systems Laboratory, Empa | 2 | milp, python, gis, fastfluiddynamics | data analysis, simulation, energy, modeling & optimization, data portal, distributed energy systems | Science and Medicine | 2017 |
| Ushahidi | 1 | 2010 | |||
| Vert.x | 1 | java, reactive, javascript, groovy, micro-services | micro services, high performance computing | Programming Languages and Development Tools | 2016 |
| VideoLAN | 7 | c++, asm, c, go, qt, c#, assembly, opengl, vue.js | graphics, 3d, audio, video, multimedia, codecs, video processing, vr, web | Graphics / Video / Audio / Virtual Reality | 2020 |
| VideoLAN / VLMC Project | 1 | opengl, c++, c, assembly, qt | video, multimedia, editor, editing, non-linear | Graphics / Video / Audio / Virtual Reality | 2016 |
| ViSP | 2 | vision, c/c++, c++ | robotics, vision, computer vision | Graphics / Video / Audio / Virtual Reality | 2018 |
| Visualization Toolkit (VTK) | 2 | 2014 | |||
| vitrivr | 2 | spark, java, machinelearning, grpc, computervision, databases, angularjs, web | multimedia retrieval, 3d, audio, video, databases, retrieval, multimedia | Data and Databases | 2018 |
| Wayland | 1 | opengl, wayland, c, xml, kms | graphics, window system, display, video | Graphics / Video / Audio / Virtual Reality | 2016 |
| webpack | 3 | webdevelopment, webpack, html5/css3, webasssembly, node.js, javascript, webassembly | tooling, toolchains, parser, web performance, compilers, programming languages and development tools, web development | Programming Languages and Development Tools | 2020 |
| Wikimedia | 2 | 2014 | |||
| Wikimedia Foundation | 10 | android, php, rubyonrails, html, javascript, css, jquery, reactjs, python | wiki, semantic web, i18n, mediawiki, mediawiki, wiki, encyclopedia, wikimedia, semantic web, i18n, wikipedia, input methods, education, web, web | Web | 2020 |
| Wine | 1 | 2011 | |||
| Wine (a project of Software Freedom Conservancy) | 1 | 2012 | |||
| Wine Project | 1 | 2013 | |||
| WinLibre | 1 | 2009 | |||
| Wireshark | 2 | pcap, qt, lua, c/c++, cmake | network monitoring, data visualization, network security | Security | 2020 |
| WordPress | 5 | 2014 | |||
| World Wide Web Consortium (W3C) | 1 | 2013 | |||
| WorldBrain - Verifying the Internet with Science | 1 | reactjs, javascript | fake-news, misinformation, search, digital knowledge | Social / Communications | 2017 |
| WorldBrain.io - Verifying the Internet | 1 | react, javascript, browserextension, datproject | search, fake-news, decentralization, misinformation, bookmarking | End User Applications | 2018 |
| WorldForge | 6 | 2014 | |||
| WSO2 | 4 | soa, java, middleware, distributedcomputing, webservices | data analysis, micro services, security, iot, api management, cloud | Other | 2017 |
| wxWidgets | 5 | c++, win32, gtk+, cocoa | gui, desktop, cross-platform | Programming Languages and Development Tools | 2017 |
| X.Org | 2 | 2010 | |||
| X.Org Foundation | 9 | c++, wayland, c, opencl, vulkan, opengl, x11 | graphics, 2d acceleration, 3d, video, media acceleration, windowing system, testing/ci, graphic stack, graphics stack, 2d/3d graphics, operating system, 3d acceleration, windowing systems, gpu | Graphics / Video / Audio / Virtual Reality | 2020 |
| Xapian Search Engine Library | 8 | android, c++, golang, swig, unicode, linux | search, machine learning, integration, indexing, information retrieval, linguistics | Data and Databases | 2020 |
| XBMC | 1 | 2013 | |||
| XBMC Foundation | 4 | drupal, github, mysql, c++11, python, c/c++, xml, git | media management, video player, audio, video, home theater, media center | Graphics / Video / Audio / Virtual Reality | 2018 |
| Xelerance Corporation | 1 | 2009 | |||
| Xen Project | 2 | qemu, free/netbsd, ocaml, asm/c/c++, linux | embedded/automotive, virtualization, security, unikernels, cloud computing | Cloud | 2017 |
| xen.org | 2 | 2011 | |||
| Xi Editor | 1 | rust, swift | ide, end user application, text editor | End User Applications | 2019 |
| Xi Editor Project | 1 | rust, swift | text editing, ide | End User Applications | 2018 |
| Xiph.Org Foundation | 2 | 2015 | |||
| XMMS2 | 2 | 2010 | |||
| XMMS2 - X-platform Music Multiplexing System 2 | 1 | 2011 | |||
| XMPP Standards Foundation | 6 | xmpp, c++, vala, java, lua, webrtc, javascript, erlang | chat, messaging, voip, communications, realtime communication, social, instant messaging | Social / Communications | 2020 |
| XMPP Standards Foundation (XSF) | 1 | asynchronousi/o, lua, xmpp, java, python3 | instant messaging, realtime communications, machine-to-machine, internet of things, xmpp | Social / Communications | 2019 |
| xpra | 1 | python, javascript, c | remote-access, video, desktop, seamless | Graphics / Video / Audio / Virtual Reality | 2019 |
| xpra.org | 1 | python, javascript, compression, remoteaccess, cython | graphics, remote access | End User Applications | 2018 |
| XWiki | 8 | html5, java, velocity, css, javascript, css3 | wiki, web applications, platform, web platform and services, web applications, structured data, structured data, wiki, web platform and services, web development, extensions, platform | Web | 2020 |
| YafaRay (Yet Another Free Raytracer) | 1 | 2010 | |||
| Zenodo | 1 | python, postgresql, flask, angularjs, elasticsearch | content management, web, open science, digital library, machine learning | Science and Medicine | 2017 |
| Zulip | 3 | typescript, python, electron, django, reactnative, javascript | chat, bots, great developer tooling, mobile, cross-platform, enterprise, group chat, visual design, web development, mobile applications, team chat | Social / Communications | 2020 |
| Zulip Open Source Project | 2 | android, javascript, electron, django, reactnative, python, ios | chat, bots, full stack web and mobile, great developer tooling, mobile, group chat, visual design, high quality codebase | Social / Communications | 2019 |
| ZynAddSubFX | 1 | c/c++, ruby, midi, open-sound-control, opengl | audio, digital signal processing, visualization, music, user experience | Graphics / Video / Audio / Virtual Reality | 2019 |
| École Polytechnique Fédérale de Lausanne, Scala team | 1 | 2010 |