Chapel
A Productive Parallel Programming Language
- 2026
- –
- Cycles
- 5
- Projects
- 16
- Trend
DIRECTORY
522 organizations since 2016
Filter by stack, capacity and track record. Every number comes from Google's public archive.
Checker Framework
Prevent programming errors via simple verification
- 2026
- –
- Cycles
- 5
- Projects
- 17
- Trend
Elm Software Foundation
A delightful functional language for reliable webapps.
- 2026
- –
- Cycles
- 1
- Projects
- 1
- Trend
Fortran-lang
Fortran-lang is an open-source community that develops tools and libraries for modern Fortran development. Our flagship projects include the standard library, Fortran build system and package manager, as well as the interactive compiler, LFortran. Fortran-lang also provides an inclusive and welcoming space for all Fortran enthusiasts around the world to collaborate.
- 2026
- 4
- Cycles
- 6
- Projects
- 25
- Trend
FOSDEM
The organization that handles all aspects of the FOSDEM conference
- 2026
- –
- Cycles
- 3
- Projects
- 4
- Trend
Graphite
Graphite is an in-development raster and vector graphics editing suite that's free and open source. It is powered by a node graph compositing engine that fuses layers with nodes, bringing a generative, procedural approach to the workflows of artists, designers, and animators ranging from students and hobbyists to creative professionals and studios.
- 2026
- 5
- Cycles
- 3
- Projects
- 13
- Trend
Joomla!
The Joomla CMS is a PHP based application that powers about 2.2% of the web, 3.5% of all CMS based websites, as well as many intranets. Joomla has been downloaded over 119 Million times: https://downloads.joomla.org/
- 2026
- 3
- Cycles
- 8
- Projects
- 39
- Trend
Kapitan
Templated configuration management for Kubernetes, Terraform and other things
- 2026
- –
- Cycles
- 2
- Projects
- 2
- Trend
MetaCall
When working with different technologies and developers of different programming languages, the productivity of the entire team worsens due to the lack of interoperability and communication between them. If the developers need two technologies which are written in different programming languages, for instance, a C/C++ library called from NodeJS, the team usually needs to port to one of the two languages or write a wrapper around them. Maintaining a port of a library or the plumbing code is frequently error-prone, time-consuming, and does not add any value to the final product.
- 2026
- 6
- Cycles
- 5
- Projects
- 25
- Trend
Open Technologies Alliance - GFOSS
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
PLASMA-UMass
PLASMA explores ways to make programming languages faster, safer, and easier.
- 2026
- –
- Cycles
- 1
- Projects
- 1
- Trend
Python Software Foundation
Python is a programming language that lets you work more quickly and integrate your systems more effectively.
- 2026
- 13
- Cycles
- 11
- Projects
- 290
- Trend
Ruby
The Ruby organization collects mentors and students working on the Ruby language (MRI), the Ruby packaging system (Bundler, RubyGems, and RubyGems.org), and other Ruby projects. Any Ruby OSS project is eligible to be included in the Ruby GSOC organization.
- 2026
- 5
- Cycles
- 8
- Projects
- 43
- Trend
Scalable Parallel Computing Laboratory
High-performance computing for clusters and clouds
- 2026
- –
- Cycles
- 2
- Projects
- 6
- Trend
St. Jude Children's Research Hospital
St. Jude Children's Research Hospital is a non-profit research hospital dedicated to advancing cures and means of prevention for children with catastrophic diseases. With respect to Google Summer of Code, we're interested in building modern, open-source infrastructure upon which large-scale scientific analyses can be done (typically focused on bioinformatics or genomics specifically).
- 2026
- 1
- Cycles
- 2
- Projects
- 3
- Trend
Sugar Labs
Sugar is an activity-focused, free/libre open-source software (FLOSS) learning platform for children. Collaboration, reflection, and discovery are integrated directly into the user interface. Through Sugar's clarity of design, children and teachers have the opportunity to use computers on their own terms. Students can reshape, reinvent, and reapply both software and content into powerful learning activities. Sugar's focus on sharing, constructive criticism, and exploration is grounded in the culture of free software and the ideals of learn-by-doing "Constructionism".
- 2026
- 10
- Cycles
- 11
- Projects
- 99
- Trend
SymbiFlow
A completely FOSS toolchain for FPGAs.
- 2026
- –
- Cycles
- 3
- Projects
- 5
- Trend
The Center for Connected Learning and Computer-Based Modeling
NetLogo: A language and IDE for programming and scientific simulations
- 2026
- –
- Cycles
- 4
- Projects
- 5
- Trend
The Rust Foundation
The Rust Project is a group of developers and maintainers who build and support the Rust programming language. Organised into teams, they develop new features and mantain the Rust language, its compiler and standard library, and also all kinds of infrastructure that supports Rust. This application is being made by the Rust Foundation, the legal entity for the Rust Programming language, working in close association with representatives from the Rust Project.
- 2026
- 13
- Cycles
- 3
- Projects
- 41
- Trend
Contributor counts are accepted projects per cycle.
A TO Z
Every organization since 2016
A
- AboutCode
- Academy Software Foundation
- Accord Project
- AerospaceResearch.net
- AFLplusplus
- aimacode
- Alaska
- Amahi
- Android Graphics Tools Team
- AnitaB.org Open Source
- AnkiDroid
- AOSSIE
- AOSSIE - The Australian National University's Open-Source Software Innovation and Education
- Apache DataFusion
- Apache Software Foundation
- Apertium
- Apertus Association
- API Client Tools at Google
- API Dash
- appleseed
- ArchC
- Arduino
- ArduPilot
- ASCEND
- AsyncAPI
- Audacity
B
C
- C2SI
- Cadasta
- caMicroscope
- Canadian Centre for Computational Genomics
- Carbon Language
- Casbin
- CASTOR
- cBioPortal for Cancer Genomics
- CBMI@UTHSC
- CCExtractor Development
- Celluloid
- Center for Research in Open Source Software (CROSS)
- Center for Translational Data Science
- Ceph Foundation
- CERN SFT
- CERN-HSF
- CGAL Project
- CHAOSS
- Chapel
- Checker Framework
- checkstyle
- CHIPS Alliance
- Chromium
- Cilium
- CircuitVerse.org
- City of Boston
- CiviCRM
- Classical Language Toolkit
- CLiPS, University of Antwerp
- Clojure
- CloudCV
- CMU Sphinx
- CNCF
- coala
- Cockpit Project
- Computational Biology @ University of Nebraska-Lincoln
- Computational Science and Engineering at TU Wien
- Continuous Delivery Foundation
- Conversations.im
- Copyleft Games
- coreboot
- Creative Commons
- CRIU
- Cuneiform Digital Library Initiative (CDLI)
- CVAT
- CVXPY
D
- D Language Foundation
- Dart
- Data for the Common Good
- DatenLord
- DBpedia
- Debian
- DeepChem
- DeepPavlov
- Department of Biomedical Informatics, Emory University
- Developers Italia
- Digital Impact Alliance (DIAL) at UN Foundation
- Discourse
- Distributed and Unified Numerics Environment (DUNE)
- Django Software Foundation
- dora-rs
- Drupal Association
E
F
G
- Gambit - Software Tools for Game Theory
- Gambit: The package for computation in game theory
- Ganeti
- GCP Scanner
- GDevelop
- Gemini CLI
- Genes, Genomes and Variation
- GENIVI Alliance
- Genome Assembly and Annotation
- Gentoo Foundation
- GeomScale
- German Center for Open Source AI
- Git
- GitHub
- GitLab
- Global Alliance for Genomics and Health
- GNOME Foundation
- GNSS-SDR
- GNU Compiler Collection (GCC)
- GNU Image Manipulation Program
- GNU Mailman
- GNU Mailman Project
- GNU Octave
- GNU Project
- GNU Radio
- GnuTLS
- Godot Engine
- Google DeepMind
- Google FHIR SDK
- GPAC
- gprMax
- GRAME
- Graphite
- GraphQL Foundation
- Green Navigation
- gRPC
- GRR Rapid Response
- gVisor
I
- illumos.org
- INCF
- Inclusive Design Institute
- Indic Project
- Inkscape
- Inria Foundation
- Institut für Angewandte Informatik (InfAI) e.V.
- Institute for Artificial Intelligence
- Intel Video and Audio for Linux
- InterMine
- International Catrobat Association
- Internet Archive
- Internet Health Report
- Internet Systems Consortium
- Invesalius
- IOOS
- Ivy (lets-unify.ai)
J
K
L
M
- Machine Learning for Science (ML4SCI)
- MacPorts
- MalariaGEN
- Mantis
- MapAction
- MariaDB
- Mathesar
- Matrix.org
- Mautic
- Mayor's Office of New Urban Mechanics
- MBDyn
- McGill Space Institute
- MDAnalysis
- Measurement Lab
- Media Cloud
- MediaPipe
- Meshery
- MetaBrainz Foundation Inc
- MetaCall
- Metaflow
- Metasploit
- MGGG Redistricting Lab
- Micro Electronics Research Lab - UITU
- Microkernel devroom
- MIT App Inventor
- Mixxx
- MLLAM
- mlpack
- Mobile Robot Programming Toolkit (MRPT)
- ModSecurity
- MoFA Org
- MoganLab
- Moira
- moja global
- Monado
- Mono Project
- Moodle
- MoveIt
- Mozilla
- MuseScore
- mypy
- MZmine
- MZmine and MS-DIAL
N
O
- omegaUp
- Open Bioinformatics Foundation (OBF)
- Open Chemistry
- Open Chromosome Collective
- Open Climate Fix
- Open Data Kit
- Open Detection
- Open Ephys
- Open Food Facts
- Open Genome Informatics
- Open HealthCare Network
- Open Roberta
- Open Robotics
- Open Science Initiative for Perfusion Imaging
- Open Science Labs
- Open States
- Open Technologies Alliance - GFOSS
- Open Transit Software Foundation
- Open3D team
- OpenAFS
- OpenAstronomy
- OpenCensus
- OpenCV
- OpenELIS Global
- OpenEMR
- OpenHMD
- OpenKeychain (OpenPGP for Android)
- OpenMined
- OpenMRS
- OpenMS
- OpenRefine
- OpenSIPS
- OpenStreetMap
- openSUSE Project
- OpenVINO Toolkit
- OpenWISP
- OpnTec
- Oppia Foundation
- Orange – Data Mining Fruitful & Fun
- Orcasound
- Organic Maps
- OSGeo (Open Source Geospatial Foundation)
- OSU Open Source Lab
- Our World In Data
- oVirt
- OW2
- OWASP Foundation
- ownCloud
P
- P2PSP.org
- PAL Robotics
- PEcAn Project
- Peragro
- Percona
- Performance Co-Pilot
- Pharo Consortium
- phpBB Forum Software
- phpMyAdmin
- Physical Web Project
- Pidgin Instant Messenger
- Pitivi
- Plan 9 Foundation
- PLASMA-UMass
- Plone Foundation
- PMD
- Pocket Science Lab
- Point Cloud Library
- Polly Labs
- Polypheny
- Portland State University
- PostgreSQL
- Postman
- PowerDNS
- preCICE
- PRISM Model Checker
- Probot
- Processing Foundation
- Project Mesa
- Project PANOPTES
- Project WikiLoop
- Prometheus-Operator
- Public Lab
- Purr Data
- Python Software Foundation
R
S
- SageMath
- Salesforce
- Samba
- Scala Center
- Scalable Parallel Computing Laboratory
- Scilab
- SCoRe Lab
- ScummVM
- SeaQL
- Seastar
- Semi Technologies
- Shaka Player
- Shogun
- Sigmah
- sktime
- Society for Arts and Technology (SAT)
- Software and Computational Systems Lab at LMU Munich
- Software Heritage
- Soletta Project
- Space @ Virginia Tech
- SPDX
- SQLancer
- St. Jude Children's Research Hospital
- stdlib
- Ste||ar group
- Stemformatics
- Stichting SU2
- Stony Brook University Biomedical Informatics
- strace
- Stratosphere Laboratory, Czech Technical University in Prague
- Streetmix
- Submitty
- Sugar Labs
- SW360
- Swift
- SymbiFlow
- SymPy
- Synfig
- syslog-ng
- Systers Community
- Systers, an Anita Borg Institute community
T
- Tarantool
- TARDIS RT Collaboration
- TARDIS SN
- TEAMMATES @ National University of Singapore
- TensorFlow
- The Apache Software Foundation
- The Center for Connected Learning and Computer-Based Modeling
- The ENIGMA Team
- The FreeBSD Project
- The Honeynet Project
- The JPF team
- The Julia Language
- The Libreswan Project
- The Linux Foundation
- The Mifos Initiative
- The Monarch Initiative
- The NetBSD Foundation
- The ns-3 Network Simulator Project
- The OpenROAD Initiative
- The P4 Language Consortium
- The Palisadoes Foundation
- The Perl Foundation
- The Postgres Operator
- The Qt Project
- The Rust Foundation
- The Terasology Foundation
- The Tor Project
- The Vega Project at the University of Washington
- The Wine Project
- TianoCore
- Tiled
- Timelab Technologies Ltd.
- TimVideos.us
- TLA+
- Tokio
- Tungsten Fabric
- Typelevel
U
W
X