522 organizations since 2016

• 

  Blender Foundation

  End user applications

  Blender is a free and open source 3D creation suite, providing individuals and small teams a complete pipeline for 3D graphics, modeling, animation and games.

  2026

  8

  Cycles

  11

  Projects

  72

  Trend

  CPythonOpenGLC+++2
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  BRL-CAD

  Media

  <p>This is the place to be if you love computer graphics. We do 2D/3D modeling, 3D printing, solid geometry, design, and more. Depending on the project, you have the opportunity to work with C/C++, Python, OpenGL, OpenCL, Qt, Javascript, and more... Help us develop open source computer-aided technologies (CAx)!</p> <br> <p>We operates as an umbrella organization with several CAx communities including:</p> <br> <ul> <li> - OpenSCAD is a solid 3D modeler with a rich syntax for programmable geometry. <li> - LibreCAD is a 2D modeling system specializing in blueprint-style drawings and draftings. <li> - IfcOpenShell is a library for working with standard IFC building model data. <li> - BRL-CAD is a solid modeling suite with conversion and advanced solid ray tracing features. <li> - Manifold is a solid geometry mesh processing library. </ul> <br> <p>We want to select at least one student for each, so feel free to ask us where to start.</p> <br> <a href="https://opencax.github.io"><img src="https://summerofcode.withgoogle.com/media/org/brl-cad/4ec07aqdfrvygfed-360.png"></a>

  2026

  8

  Cycles

  11

  Projects

  81

  Trend

  PythonCC++OpenGL+7
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  KDE Community

  End user applications

  Community of technologists, designers, writers and advocates who work to ensure freedom for all people through our software.

  2026

  12

  Cycles

  11

  Projects

  179

  Trend

  C++QtCMakePHP+6
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  LibreOffice

  End user applications

  LibreOffice is a modern Free & Open Source Office suite, one of the largest open source projects, and used by millions of users worldwide. LibreOffice is compatible with many file formats like Microsoft® Word, Excel, PowerPoint and Publisher. At its heart though, LibreOffice is built around an open standard, the OpenDocument Format, as its native file format. LibreOffice is developed by users who, just like you, believe in the principles of Free Software and in sharing their work with the world in non-restrictive ways. The development of LibreOffice is supported by The Document Foundation which provides the infrastructure for the project. We believe that users should have the freedom to run, copy, distribute, study, change and improve the software that we distribute. While we do offer no-cost downloads of the LibreOffice suite of programs, Free Software is first and foremost a matter of liberty, not price. We campaign for these freedoms because we believe that everyone deserves them. Though the members of our community hail from many different backgrounds, we all value personal choice and transparency, which translates practically into wider compatibility, more utility, and no end-user lock-in to a single product. We believe that Free Software can provide better-quality, higher-reliability, increased-security, and greater-flexibility than proprietary alternatives. LibreOffice is a large project (approx. 6MLOC), which makes it interestingly complex, but at the same time, provides a place for all sorts of contribution & skills. The community behind LibreOffice is the heart of the project, without which we would not have the resources to continue developing our software. The passion and drive that every individual brings to the community results in collaborative development that often exceeds our own expectations. With tons of different roles in the project, we invite everyone to join us in our work and help us to make LibreOffice known, prosper, and accessible to all.

  2026

  3

  Cycles

  11

  Projects

  68

  Trend

  PythonAndroidJavaOpenGL+1
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  MetaBrainz Foundation Inc

  Data

  The MetaBrainz Foundation is a non-profit that believes in free, open access to data. It has been set up to build community maintained databases and make them available in the public domain or under Creative Commons licenses.

  2026

  7

  Cycles

  11

  Projects

  67

  Trend

  PythonPostgreSQLJavaScriptPerl+7
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  OpenStreetMap

  Data

  OpenStreetMap is a crowdsourcing project that creates and distributes free geographic data for the world. Our data is collected by hundreds of thousands of contributors around the globe and released with an open-content license. We allow free access not only to our map products, but all the underlying map data, which powers websites and apps used by billions of people worldwide.

  2026

  5

  Cycles

  11

  Projects

  50

  Trend

  JavaScriptJavaOpenGLRuby+9
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  ScummVM

  End user applications

  ScummVM is a game preservation project with a quickly growing code base since more than 20 years. Originally focused on 2D Point&Click adventure games, its scope widened in 2016 to RPG thanks to successful GSoC students and to 3D games in 2020 after the merge with its sister project, ResidualVM. The purpose is only to replace the game executable, not to enhance or replace the game assets.

  2026

  4

  Cycles

  11

  Projects

  38

  Trend

  OpenGLC++AssemblySdl+4
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  The Honeynet Project

  Security

  The Honeynet Project is a leading international 501c3 non-profit security research organization, dedicated to investigating the latest attacks and developing open source security tools to improve Internet security. With Chapters around the world, our volunteers have contributed to fight against malware (such as Conficker), discovering new attacks and creating security tools used by businesses and government agencies all over the world.

  2026

  8

  Cycles

  11

  Projects

  109

  Trend

  PythonAndroidMachine learningHTML+14
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  VideoLAN

  End user applications

  The VideoLAN project is led by and composed of a team of volunteers who believe in the power of open source to rock the multimedia world. We produce multimedia software notably the famous VLC media player as well as designated libraries and codecs.

  2026

  15

  Cycles

  11

  Projects

  107

  Trend

  COpenGLC++Qt+9

Contributor counts are accepted projects per cycle.