Science and medicine
NumFOCUS
NumFOCUS promotes open source scientific software.
20262025202420232022202120202019201820172016
C++juliaPythonR
- Projects
- 303
- Participations
- 11
End user applications
Python Software Foundation
A programming language used for science & more
20262025202420232022202120202019201820172016
JavaScriptPython
- Projects
- 289
- Participations
- 11
Web
The Apache Software Foundation
Open source software to the public free of charge
20262025202420232022202120202019201820172016
CC++Java
- Projects
- 280
- Participations
- 11
Science and medicine
CERN-HSF
Umbrella for Particle Physics-related projects
2026202520242023202220212020201920182017
AICC++container orchestrationdata analysisPython
- Projects
- 239
- Participations
- 10
Science and medicine
R project for statistical computing
R software for statistical computing & graphics
20262025202420232022202120202019201820172016
CC++fortranJavaScriptR
- Projects
- 234
- Participations
- 11
Science and medicine
INCF
An open & FAIR neuroscience standards organization
20262025202420232022202120202019201820172016
C++gpuJavaJavaScriptPython
- Projects
- 232
- Participations
- 11
End user applications
KDE Community
Control your digital life
20262025202420232022202120202019201820172016
C++data structuresqmlqt
- Projects
- 176
- Participations
- 11
End user applications
FOSSASIA
Free and Open Source Software in Asia
2026202520242019201820172016
androidCdjangoJavaScriptPython
- Projects
- 160
- Participations
- 7
Operating systems
The Linux Foundation
Non-profit consortium fostering growth of Linux
20262025202420232022202120202019201820172016
AICcupsfuzz-testinglinux
- Projects
- 156
- Participations
- 11
Science and medicine
Machine Learning for Science (ML4SCI)
Machine learning applications in science
202620252024202320222021
AIC++data analysismachine learningPython
- Projects
- 152
- Participations
- 6
Science and medicine
The Julia Language
A fresh approach to technical computing
2026202520242023202220212020201920172016
Compilerdata sciencegarbage-collectionjuliamachine learning
- Projects
- 151
- Participations
- 10
End user applications
Zulip
Organized chat for distributed teams
20262025202420232022202120202019201820172016
CSSdjangoflutterPythonTypeScript
- Projects
- 144
- Participations
- 11
End user applications
AOSSIE
Australian Umbrella Org for Open-Source Projects
2026202520242023202220212020201920182017
androidBlockchainflutterJavaScriptPythonSolidity
- Projects
- 137
- Participations
- 10
Programming languages
LLVM Compiler Infrastructure
LLVM Compiler Infrastructure
20262025202420232022202120202019201820172016
C++clangllvmmlir
- Projects
- 133
- Participations
- 11
Science and medicine
National Resource for Network Biology (NRNB)
Developing open source tools for network biology
20262025202420232022202120202019201820172016
CSSHTMLJavaScriptjsonLLMPython
- Projects
- 126
- Participations
- 11
Security
OWASP Foundation
No more insecure software.
2026202520242023202220212020201920182016
JavaJavaScriptJuice ShopPythonZAP
- Projects
- 125
- Participations
- 10
Operating systems
GNOME Foundation
A diverse and sustainable free software desktop.
20262025202420232022202120202019201820172016
CFlatpakgtklinuxRust
- Projects
- 121
- Participations
- 11
Data
CNCF
Building sustainable ecosystems for cloud native
2026202520242023202220212020201920182017
envoykubernetesOpenTelemetryprometheus
- Projects
- 118
- Participations
- 10
End user applications
The Mifos Initiative
End Poverty One Line of Code at a Time
2026202520242023202220202019201820172016
androidangularJavakotlinspring
- Projects
- 115
- Participations
- 10
Social and communication
rocket.chat
Open source communications platform for the AI age
2026202520242023202220212020201920182017
AIJavaScriptLLMNode.jsTypeScript
- Projects
- 113
- Participations
- 10
Security
The Honeynet Project
Honeypots and Threat Intelligence R&D
20262025202420232022202120202019201820172016
djangodockerGoJavaScriptPython
- Projects
- 109
- Participations
- 11
End user applications
OSGeo (Open Source Geospatial Foundation)
The Open Source Geospatial Foundation
20262025202420232022202120202019201820172016
CC++JavaJavaScriptPython
- Projects
- 107
- Participations
- 11
End user applications
VideoLAN
Open Source Multimedia for everyone!
20262025202420232022202120202019201820172016
AssemblyCC++qtvideo
- Projects
- 105
- Participations
- 11
Science and medicine
OpenMRS
Write Code, Save Lives.
20262025202420232022202120202019201820172016
fhirJavaJavaScriptmysqlReact
- Projects
- 102
- Participations
- 11
End user applications
Sugar Labs
Learning software for children
20262025202420232022202120202019201820172016
gtkJavaScriptLLMPythonTypeScript
- Projects
- 99
- Participations
- 11
Programming languages
International Catrobat Association
Free visual coding apps for computational thinking
20262025202420232022202120202019201820172016
flutterJavaScriptkotlinphpPythonswift
- Projects
- 96
- Participations
- 11
Programming languages
Processing Foundation
To empower all people to learn to program
202620252023202220212020201920182017
androidGitHub ActionsJavaJavaScriptopenglPythonTypeScriptwebgl
- Projects
- 93
- Participations
- 9
Web
Wikimedia Foundation
Bringing free educational content to the world
2026202420232022202120202019201820172016
CSSHTMLJavaScriptphpPython
- Projects
- 93
- Participations
- 10
Operating systems
The FreeBSD Project
An OS for servers to embedded devices
20262025202420232022202120202019201820172016
AssemblyCllvmmakePOSIX shell
- Projects
- 87
- Participations
- 11
End user applications
CCExtractor Development
TV, Rust, Flutter, Linux, VR and C. In any order.
20262025202420232022202120202019201820172016
CflutterlinuxRust
- Projects
- 86
- Participations
- 11
Data
Liquid Galaxy project
We code immersive and interactive apps with GEarth
2026202520242023202220212020201920172016
androidflutterGoogle EarthlinuxNode.js
- Projects
- 85
- Participations
- 10
Operating systems
Debian
The Universal Operating System
202620252024202220212020201920182016
C++JavaperlPythonRust
- Projects
- 84
- Participations
- 9
End user applications
Oppia Foundation
Free platform for interactive, tutor-like lessons
20262025202420232022202120202019201820172016
angularApache Beamgoogle app enginePythonTypeScript
- Projects
- 84
- Participations
- 11
Science and medicine
OpenAstronomy
Look at the Universe with the power of Open Source
20262025202420232022202120202019201820172016
CC++juliaPython
- Projects
- 82
- Participations
- 11
Media
BRL-CAD
3D CAD & other computer-aided tech (CAx)
20262025202420232022202120202019201820172016
CC++openclopenglPythonscripting
- Projects
- 81
- Participations
- 11
Science and medicine
Open Technologies Alliance - GFOSS
Promote Open Standards and Open Source
202620252024202320222021201920182017
CC++JavaScriptMachine learningNode.jsPython
- Projects
- 76
- Participations
- 9
Programming languages
Haskell.org
Purely functional programming language
20262025202420222021202020192018
ghchaskell
- Projects
- 73
- Participations
- 8
End user applications
Blender Foundation
The Freedom to Create
20262025202420232022202120202019201820172016
CC++openglPythonvulkan
- Projects
- 72
- Participations
- 11
Programming languages
Eclipse Foundation
The Global Open Source Foundation
2026202520242023202220202019201820172016
eclipsejavaidejakartaeeJavartossoftwaredefinedvehicles
- Projects
- 72
- Participations
- 10
End user applications
LibreOffice
LibreOffice is a free and open source office suite
20262025202420232022202120202019201820172016
C++JavaPython
- Projects
- 68
- Participations
- 11
Science and medicine
SymPy
SymPy is a Python library for symbolic mathematics
20262025202420232022202120202019201820172016
jupyternumpyPython
- Projects
- 68
- Participations
- 11
Data
MetaBrainz Foundation Inc
Open music / book metadata, music recommendations
20262025202420232022202120202019201820172016
machine learningperlPostgreSQLPythonspark
- Projects
- 67
- Participations
- 11
Data
DBpedia
Global and Unified Access to Knowledge Graphs.
20262025202420232022202120202019201820172016
JavaJavaScriptPythonrdfscala
- Projects
- 66
- Participations
- 11
Science and medicine
CGAL Project
C++ library of computational geometry
2026202520242023202220212020201920182017
C++qt
- Projects
- 65
- Participations
- 10
Other
Free and Open Source Silicon Foundation
Working together for Free and Open Source Silicon
20262025202420232022202120202019201820172016
CompilerRISC-VverilogvhdlWeb
- Projects
- 64
- Participations
- 11
Operating systems
GNU Project
Development of the GNU Operating System
20262024202320202019201820172016
autotoolsCC++gccGNU
- Projects
- 64
- Participations
- 8
Web
JBoss Community
Community of projects around JBoss Middleware
20262022202120202019201820172016
cloudGoJavakubernetesNode.jsReactRust
- Projects
- 60
- Participations
- 8
Operating systems
openSUSE Project
Makers' choice for sysadmins, developers & users
2026202520242023202220212020201820172016
CC++GoPythonreactjs javascriptRuby
- Projects
- 60
- Participations
- 10
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