522 organizations since 2016

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  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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  CCExtractor Development

  End user applications

  CCExtractor Development is the creator of the de-facto captions extraction tool - CCExtractor. It is the one tool that is free, portable, open source and community managed that can take a recording from a TV show and generate an external subtitle file for it.

  2026

  6

  Cycles

  11

  Projects

  86

  Trend

  CLinuxVideoFFmpeg+13
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  CGAL Project

  Science and medicine

  CGAL is a software library that offers a number of reliable geometric data structures and algorithms. CGAL components operate in 2D and 3D, and sometime in arbitrary dimensions. Examples of components include convex hulls, convex decomposition, Delaunay triangulations, Voronoi diagrams, polygonal surface mesh data-structures, mesh generation, Boolean operations, envelope computations, intersection detection, surface reconstruction, and subdivision surfaces.

  2026

  7

  Cycles

  10

  Projects

  65

  Trend

  GitHubC++GitPython+3
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  checkstyle

  Programming languages

  Checkstyle is a development tool to help programmers write Java code that is easy to read and adheres to a coding standard. Our utility automates the process of checking Java code to spare humans of this boring (but important) task. This makes it ideal for projects that want to enforce a coding standard. Each and every check also forces our users who are not familiar with these standards to read them and makes them think about why these standards exist.

  2026

  6

  Cycles

  8

  Projects

  27

  Trend

  JavaAntlrXpathArtificial-intelligence
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  Drupal Association

  Web

  Drupal is a powerful Content Management System (CMS) and framework built on PHP, used globally by governments, universities, and businesses to build complex websites and applications, offering unmatched flexibility, security, and scalability through its modular architecture (modules and themes) and community-driven development.

  2026

  6

  Cycles

  10

  Projects

  45

  Trend

  JavaScriptHTML5SQLPHP+9
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  Eclipse Foundation

  Programming languages

  The Eclipse Foundation provides our global community of individuals & organizations with a mature, scalable, and business-friendly environment for OSS collaboration and innovation.

  2026

  6

  Cycles

  10

  Projects

  74

  Trend

  CC++JavaGeospatial+15
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  GNOME Foundation

  Operating systems

  The GNOME Foundation is a non-profit organization that believes in a world where everyone is empowered by technology they can trust. We do this by building a diverse and sustainable free software personal computing ecosystem.

  2026

  6

  Cycles

  11

  Projects

  121

  Trend

  CPythonJavaScriptGTK++6
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  JBoss Community

  Web

  JBoss Community is a community of open source projects. The community hosts a diverse set of projects that are written in various programming languages. The primary language is Java, however there are also projects that are written in Go, Rust, Ruby, PHP, Node and other languages.

  2026

  8

  Cycles

  8

  Projects

  60

  Trend

  AndroidJavaIDEAsciidoctor+11
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  MariaDB

  Data

  MariaDB Foundation is the non-profit organization behind MariaDB Server, the fastest growing open source databases. MariaDB Foundation's mission is to ensure the continuity of the MariaDB Server code as well as foster and facilitated collaboration within the MariaDB ecosystem. As part of GSoC, MariaDB Foundation seeks to bring more developers into the MariaDB Server (and related projects) code base.

  2026

  8

  Cycles

  11

  Projects

  47

  Trend

  CMySQLMariaDBPerl+6
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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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  National Resource for Network Biology (NRNB)

  Science and medicine

  The National Resource for Network Biology (NRNB, https://nrnb.org) organizes the development of free, open-source software technologies to enable network-based visualization, analysis, and biomedical discovery. Biomedical research is increasingly dependent on knowledge expressed in terms of networks, including gene, protein and drug interactions, cell-cell and viral-host communication, and vast social networks. Our technologies enable researchers to assemble and analyze these networks and to use them to better understand biological systems and, in particular, how they fail in disease. The NRNB mentoring organization includes projects such as Cytoscape (https://cytoscape.org/), WikiPathways (https://wikipathways.org/), SBML (https://sbml.org/), SBGN (https://sbgn.github.io/) and others. This is a great opportunity to work at the intersection of biology and computing! For example, Cytoscape is downloaded over 24,000 times per month by researchers. We take mentoring seriously and are proud of our 96% success rate (https://nrnb.org/alumni.html#gsoc-tab) with former students and projects. But don’t take our word for it, read testimonials from prior NRNB students (https://nrnb.org/testimonials.html#student-tab) and mentors (https://nrnb.org/testimonials.html#mentor-tab). Find out more about the software projects being developed in coordination with NRNB at our website (https://nrnb.org). Also refer to our GSoC page (https://nrnb.org/gsoc.html) for additional resources and application tips.

  2026

  7

  Cycles

  11

  Projects

  126

  Trend

  PythonJavaScriptJavaC+++10
• 

  Open Technologies Alliance - GFOSS

  Science and medicine

  Open Technologies Alliance (GFOSS) is a non-profit organization, with 37 Universities and Research Centers as its shareholders. Our main goal is to promote Openness. GFOSS – Open Technologies Alliance is a platform for Open Standards, Free Software, Open Content, Open Data & Open Hardware in Greece. The major Greek Universities and Research Centers participate in GFOSS – Open Technologies Alliance, while leading members of the Greek community of developers play a key role in the implementation of our policies. Through our initiatives we aspire to contribute and coordinate the efforts of groups of volunteers, public servants, university researchers and students enabling them to form the backbone of Greek FOSS development and implementation. GFOSS is one of the strategic actors for the promotion of OSS throughout Greece (see https://joinup.ec.europa.eu/sites/default/files/inline-files/OSS%20Country%20Intelligence%20Report_GR.pdf ). Many public administrations and academic institutions collaborate with GFOSS to implement open source projects and through Google Summer of Code we give the opportunity to students to actively engage in the production and the actual implementation of an open source project. GFOSS also contributes and advises on the development of various open source projects related to e-government and digital transformation in Greece (e.g. https://howto.gov.gr/ - https://forma.gov.gr/) and actively promotes the use of Open Source software and hardware in the Greek primary and secondary education through the Open Educational Technologies Competition (https://openedtech.ellak.gr/ )

  2026

  7

  Cycles

  9

  Projects

  77

  Trend

  PythonMySQLJavaPHP+16
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  OpenMRS

  Science and medicine

  OpenMRS provides the foundational, electronic medical record technology for more than 6,500 health facilities in over 80 countries, touching and helping millions of patients throughout the world.

  2026

  8

  Cycles

  11

  Projects

  102

  Trend

  JavaHTML5GroovyXML+11
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  openSUSE Project

  Operating systems

  The openSUSE Project is a worldwide effort that promotes the use of Linux, tools around it, and open source. The openSUSE community is made up of multiple contributing communities that collaborate as part of a global open-source network. The openSUSE community develops, builds and maintains many of the packages, tools and infrastructure for the distribution. The community works together in an open, transparent and friendly manner as part of the global Free and Open Source Software community. openSUSE creates one of the world's best Linux distributions, as well as a variety of tools, such as OBS, OpenQA, Kiwi, YaST, OSEM and Uyuni. Distributions include a rolling release (Tumbleweed), a stable annual release (Leap) and operating systems for edge, embedded, cloud and containers through MicroOS and ALP.

  2026

  8

  Cycles

  10

  Projects

  60

  Trend

  LinuxRuby On RailsRubyDocker+18
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  Oppia Foundation

  End user applications

  The Oppia project aims to empower learners across the globe by providing access to high-quality, engaging education. We envision a world where access to high-quality education is not a privilege but a human right.

  2026

  7

  Cycles

  11

  Projects

  84

  Trend

  PythonJavaScriptAngularjsCSS+7
• 

  OSGeo (Open Source Geospatial Foundation)

  End user applications

  The Open Source Geospatial Foundation (OSGeo) is a not-for-profit organization whose mission is to foster global adoption of open geospatial technology by being an inclusive software foundation devoted to an open philosophy and participatory community-driven development.<br/><br/>

  2026

  6

  Cycles

  11

  Projects

  107

  Trend

  CPythonOgc StandardsC+++6
• 

  PostgreSQL

  Data

  PostgreSQL is a powerful, open source object-relational database system with over 30 years of active development that has earned it a strong reputation for reliability, feature robustness, and performance.

  2026

  7

  Cycles

  10

  Projects

  58

  Trend

  CPostgreSQLPerlSQL+7
• 

  Processing Foundation

  Programming languages

  Our mission is to promote software learning within the arts, artistic learning within technology-related fields, and to celebrate the diverse communities that make these fields vibrant, liberatory, and innovative. Our goal is to support people of all backgrounds in learning how to program and make creative work with code, especially those who might not otherwise have access to tools and resources. We also believe that some of the most radical futures and innovative technologies are being built by communities that have been pushed to the margins by dominant tech. We hope to support those who have been marginalized by technology in continued self-determination by providing time, space, and resources.

  2026

  6

  Cycles

  9

  Projects

  93

  Trend

  PythonJavaScriptAndroidJava+5
• 

  RTEMS Project

  Operating systems

  RTEMS (Real-Time Executive for Multiprocessor Systems) is a free real-time operating system (RTOS) designed for deeply embedded systems such as automobile electronics, robotic controllers, and on-board satellite instruments.

  2026

  8

  Cycles

  11

  Projects

  54

  Trend

  CPythonEmbedded SystemsWaf+5
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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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  Wikimedia Foundation

  Web

  Wikimedia strives to bring about a world in which every single human being can freely share in the sum of all knowledge; through various projects, chapters, and the support structure of the non-profit Wikimedia Foundation. Wikimedia officially supports 13 projects, including Wikipedia, the seventh most popular site on the internet. Wikipedia receives over 20 billion global page views every month and is available in over 300 languages. The tech behind it ensures that our projects are fast, reliable, and open to all. We design and build the open-source technology that powers Wikimedia projects from hosting Wikipedia to creating edit-checking artificial intelligence (AI). Community volunteers and Foundation technologists collaborate on MediaWiki, which makes sharing free knowledge possible. Read more about Wikimedia on our homepage: https://wikimediafoundation.org/

  2026

  8

  Cycles

  10

  Projects

  93

  Trend

  JavaScriptHTMLPHPCSS+6

Contributor counts are accepted projects per cycle.