which door is yours?

Every GSoC 2026 mentoring organization from the official list, with what its ideas page offers and how long it has taken part. 2027 organizations are not announced yet; 2026 participants are the best predictor of who returns. Snapshot of 2026-10-21. Pick a few, then let the terminal tool or your assistant check which repositories merge newcomers' work.

  • 52°North Spatial Information Research GmbH

    Innovative ideas & technologies in geoinformatics

    • javascript
    • android
    • java
    • web services
    • ogc standards

    4 ideas · contributor guide · since 2016

  • AboutCode

    Scan code for origin, license and vulnerabilities

    • python
    • javascript
    • Django+PostgreSQL
    • C/Rust/Go

    6 ideas · contributor guide · since 2017

  • Accord Project

    Open source software for smart legal contracts

    • python
    • javascript
    • json
    • react
    • artificial intelligence

    6 ideas · 3 small · contributor guide · since 2020

  • Alaska

    Many Traditions, One Alaska

    • python
    • mysql
    • java
    • matlab
    • dicom

    10 ideas · contributor guide · since 2024

  • AnkiDroid

    AnkiDroid makes remembering things easy

    • android
    • rust
    • kotlin
    • mobile

    7 ideas · contributor guide · since 2021

  • AOSSIE

    Australian Umbrella Org for Open-Source Projects

    • python
    • javascript
    • flutter
    • Blockchain
    • Solidity

    contributor guide · since 2017

  • Apache Software Foundation

    Open source software to the public free of charge

    • c
    • java
    • c++

    114 ideas · 1 small · contributor guide

  • API Dash

    Next-gen AI powered Open Source API DevTool

    • python
    • react
    • flutter
    • typescript
    • ai

    contributor guide · since 2024

  • ArduPilot

    World's most advanced autonomous vehicle software

    • python
    • lua
    • c++
    • pixhawk

    6 ideas · contributor guide · since 2017

  • Blender Foundation

    The Freedom to Create

    • c
    • python
    • opengl
    • c++
    • vulkan

    12 ideas · 2 easy · 2 small · contributor guide · since 2016

  • Boa

    An ECMAScript engine written in Rust

    • javascript
    • rust

    5 ideas · contributor guide · since 2026

  • BRL-CAD

    3D CAD & other computer-aided tech (CAx)

    • python
    • c/c++
    • opengl
    • opencl
    • scripting

    31 ideas · contributor guide · since 2016

  • C2SI

    C2SI develops FOSS softwares for everyone!!!

    • python
    • java
    • go
    • nodejs
    • tensorflow

    12 ideas · 1 easy · contributor guide · since 2024

  • cBioPortal for Cancer Genomics

    Aid discovery in complex cancer genomics data

    • mysql
    • javascript
    • java
    • react
    • typescript

    9 ideas · contributor guide · since 2016

  • CCExtractor Development

    TV, Rust, Flutter, Linux, VR and C. In any order.

    • c
    • linux
    • rust
    • flutter

    10 ideas · contributor guide · since 2016

  • Ceph

    The Future of Storage

    • python
    • javascript
    • c++

    5 ideas · contributor guide

  • CERN-HSF

    Umbrella for Particle Physics-related projects

    • python
    • c/c++
    • data analysis
    • artificial intelligence
    • container orchestration

    39 ideas · contributor guide · since 2017

  • CGAL Project

    C++ library of computational geometry

    • c++
    • qt

    15 ideas · 1 small · contributor guide · since 2017

  • checkstyle

    Helps to adheres of Java coding standard

    • java
    • antlr
    • artificial-intelligence

    14 ideas · contributor guide · since 2017

  • CircuitVerse.org

    Build and learn logic circuits in the cloud!

    • javascript
    • ruby
    • rails
    • canvas
    • vue

    8 ideas · 1 easy · contributor guide · since 2019

  • CNCF

    Building sustainable ecosystems for cloud native

    • prometheus
    • kubernetes
    • OpenTelemetry
    • envoy

    13 ideas · 2 small · contributor guide · since 2017

  • CRIU

    Chekpoint/Restore for Linux tasks and containers

    • c
    • python
    • linux
    • go

    12 ideas · 1 easy · contributor guide · since 2019

  • Cuneiform Digital Library Initiative (CDLI)

    Curating humanity’s earliest written history

    • mysql
    • javascript
    • docker
    • php
    • SCSS

    contributor guide · since 2018

  • D Language Foundation

    Write fast, read fast, and run fast.

    • linux
    • make
    • d
    • windows
    • C\C++

    contributor guide · since 2016

  • Dart

    Dart is a client language for apps on any platform

    • flutter
    • dart

    6 ideas · contributor guide · since 2020

  • Data for the Common Good

    Connect. Share. Discover.

    • python
    • javascript
    • kubernetes
    • reactjs
    • terraform

    7 ideas · contributor guide · since 2024

  • DBpedia

    Global and Unified Access to Knowledge Graphs.

    • python
    • javascript
    • java
    • scala
    • rdf

    2 ideas · contributor guide · since 2016

  • Debian

    The Universal Operating System

    • python
    • java
    • perl
    • c++
    • rust

    13 ideas · 1 easy · 1 small · contributor guide · since 2016

  • DeepChem

    Democratize AI for drug discovery.

    • python
    • numpy
    • pytorch
    • HuggingFace

    contributor guide · since 2024

  • Django Software Foundation

    Web framework for perfectionists with deadlines

    • python
    • django

    7 ideas · contributor guide · since 2016

  • dora-rs

    Simplify robotic apps with AI

    • python
    • ros
    • c++
    • rust

    10 ideas · contributor guide · since 2025

  • Drupal Association

    Build Bold Digital Experiences on Best Open Source

    • mysql
    • javascript
    • html
    • php
    • symfony

    contributor guide · since 2016

  • Eclipse Foundation

    The Global Open Source Foundation

    • java
    • rtos
    • eclipsejavaide
    • jakartaee
    • softwaredefinedvehicles

    contributor guide · since 2016

  • EROFS filesystem

    Modern image-based kernel filesystem for everyone

    • c
    • android
    • linux kernel
    • Containerd
    • gVisor

    5 ideas · since 2026

  • FFmpeg

    Record, convert and stream audio & video

    • c
    • git
    • asm

    6 ideas · contributor guide · since 2016

  • FLARE

    Industry leading malware analysis

    • python
    • Sandbox
    • ida-pro

    8 ideas · 1 easy · contributor guide · since 2023

  • Fortran-lang

    High-performance parallel programming language

    • python
    • c++
    • fortran

    26 ideas · 3 easy · contributor guide · since 2021

  • FOSSASIA

    Free and Open Source Software in Asia

    • c
    • python
    • javascript
    • django
    • android

    21 ideas · 1 easy · 2 small · contributor guide · since 2016

  • FOSSology

    Open Source License Compliance by OSS

    • python
    • postgresql
    • c/c++
    • go
    • php

    since 2018

  • Free and Open Source Silicon Foundation

    Working together for Free and Open Source Silicon

    • verilog
    • vhdl
    • risc-v
    • compiler

    16 ideas · 1 easy · contributor guide · since 2016

  • FreeCAD

    Cross-platform 3D parametric modeler

    • python
    • c++
    • qt
    • OpenCASCADE
    • OpenInventor

    12 ideas · 2 easy · 2 small · contributor guide · since 2023

  • Gambit: The package for computation in game theory

    The package for computation in game theory

    • python
    • c++
    • wxwidgets
    • visualization

    9 ideas · contributor guide · since 2016

  • Gemini CLI

    Gemini CLI brings the power of Gemini directly into your terminal

    • typescript
    • GenAI
    • MCP
    • Software Agent
    • A2A

    8 ideas · contributor guide · since 2026

  • Genome Assembly and Annotation

    Unleashing the potential of big data in biology

    • python
    • mysql
    • docker
    • pytorch
    • nextflow

    16 ideas · 2 easy · contributor guide · since 2021

  • GeomScale

    Scalable geometric and statistical software

    • python
    • c++
    • r
    • jupyter
    • github-actions

    2 ideas · 3 easy · contributor guide · since 2020

  • German Center for Open Source AI

    Democratically governed AI for society

    • python
    • pytorch
    • scikit-learn

    18 ideas · 2 easy · 2 small · contributor guide · since 2026

  • Git

    Fast,Scalable,Distributed revision control system

    • shell script
    • git
    • c language

    7 ideas · 3 small · contributor guide · since 2016

  • Global Alliance for Genomics and Health

    We develop genomics tools to benefit human health

    • python
    • postgresql
    • java
    • react
    • rust

    5 ideas · contributor guide · since 2016

  • GNOME Foundation

    A diverse and sustainable free software desktop.

    • c
    • linux
    • rust
    • gtk
    • Flatpak

    6 ideas · contributor guide · since 2016

  • GNU Compiler Collection (GCC)

    GNU compilers

    • c/c++
    • gnu make
    • gnu autotools

    8 ideas · contributor guide · since 2018

  • GNU Image Manipulation Program

    GIMP is a cross-platform image editor

    • c
    • GEGL

    18 ideas · contributor guide · since 2022

  • GNU Mailman

    GNU Mailman manages your mailing lists.

    • python
    • django
    • rest
    • sqlalchemy
    • zope

    14 ideas · contributor guide

  • GNU Octave

    Free Your Numbers

    • c++
    • hg

    1 idea · contributor guide · since 2016

  • GNU Project

    Development of the GNU Operating System

    • c
    • c++
    • gcc
    • autotools
    • GNU

    contributor guide · since 2016

  • GNU Radio

    The free & open software radio ecosystem

    • python
    • c++
    • qt
    • simd

    contributor guide · since 2016

  • gprMax

    Simulating electromagnetic wave propagation

    • python
    • cuda
    • openmp
    • mpi
    • opencl

    4 ideas · contributor guide · since 2019

  • GRAME

    Domain specific language for audio

    • c
    • javascript
    • c++
    • rust
    • typescript

    14 ideas · contributor guide · since 2022

  • Graphite

    Multimedia art/design editor and graphics engine

    • rust
    • vulkan
    • webgpu

    7 ideas · 1 easy · 1 small · contributor guide · since 2024

  • Haiku

    Operating system that targets personal computing.

    • c++
    • posix
    • unix

    20 ideas · 5 easy · contributor guide · since 2017

  • Haskell.org

    Purely functional programming language

    • haskell
    • ghc

    9 ideas · contributor guide · since 2018

  • HumanAI

    AI for the Arts and the Humanities

    • python
    • machine learning
    • c++
    • data analysis
    • artificial intelligence

    15 ideas · since 2024

  • INCF

    An open & FAIR neuroscience standards organization

    • python
    • javascript
    • java
    • c++
    • gpu

    4 ideas · 2 easy · contributor guide · since 2016

  • International Catrobat Association

    Free visual coding apps for computational thinking

    • python
    • javascript
    • swift
    • kotlin
    • flutter

    21 ideas · contributor guide · since 2016

  • Internet Archive

    Universal Access to All Knowledge

    • python
    • javascript
    • go
    • elasticsearch
    • hadoop

    4 ideas · since 2017

  • Invesalius

    3D Medical visualization and neuronavigation tool

    • python
    • cython
    • numpy
    • dicom
    • Vtk

    9 ideas · 1 easy · 1 small · contributor guide · since 2023

  • IOOS

    Our eyes on the ocean, coasts, and Great Lakes

    • python
    • java
    • r
    • Zarr
    • NetCDF

    contributor guide · since 2021

  • JabRef e.V.

    Stay on top of your Literature

    • java
    • javafx
    • ai
    • bibtex

    10 ideas · 2 small · contributor guide · since 2019

  • JBoss Community

    Community of projects around JBoss Middleware

    • java
    • react
    • golang
    • cloud

    contributor guide · since 2016

  • JdeRobot

    Toolkit for developing Robotics applications

    • python
    • ros
    • gazebo
    • opencv
    • tensorflow

    8 ideas · 1 small · contributor guide · since 2017

  • Jenkins

    Jenkins, build great things at any scale

    • javascript
    • java
    • go
    • docker
    • kubernetes

    8 ideas · contributor guide · since 2016

  • Jitsi

    State-of-the-art video conferencing

    • javascript
    • java
    • react
    • kotlin
    • webrtc

    2 ideas · contributor guide · since 2017

  • Joomla!

    The flexible platform empowering website creators.

    • mysql
    • javascript
    • html
    • php
    • ai

    4 ideas · contributor guide · since 2016

  • Joplin

    The secure note taking application

    • javascript
    • react
    • typescript
    • electron
    • React-Native

    8 ideas · contributor guide · since 2020

  • JSON Schema

    We enable the reliable use of JSON data format.

    • python
    • javascript
    • typescript
    • .net
    • JSON Schema

    1 idea · contributor guide · since 2024

  • KDE Community

    Control your digital life

    • c++
    • qt
    • qml
    • data structures

    16 ideas · contributor guide · since 2016

  • Kiwix

    Internet content available offline.

    • python
    • c++
    • nodejs
    • kotlin
    • vue.js

    11 ideas · contributor guide · since 2018

  • KolibriOS Project Team

    A tiny and fast operating system in fasm

    • c
    • assembly
    • asm
    • fasm
    • pci

    17 ideas · 2 easy · 2 small · contributor guide · since 2016

  • Konflux

    Secure software pipelines, the K8s way

    • python
    • go
    • docker
    • kubernetes
    • tekton

    4 ideas · since 2026

  • Kornia

    Advancing Computer Vision & Spatial AI, Openly

    • cuda
    • rust
    • deep learning
    • data science
    • Spatial AI

    5 ideas · contributor guide · since 2025

  • Kotlin Foundation

    Advance the Kotlin programming language

    • kotlin
    • jvm
    • ai
    • Parsers & Compilers
    • Multiplatform

    4 ideas · contributor guide · since 2023

  • Kubeflow

    The Machine Learning Toolkit for Kubernetes (AI)

    • python
    • go
    • kubernetes
    • typescript
    • YAML

    11 ideas · since 2020

  • KubeVirt

    Building a virtualization API for Kubernetes

    • golang
    • grpc

    6 ideas · contributor guide · since 2023

  • LabLua

    Programming Language Research with emphasis on Lua

    • lua
    • luarocks
    • kernel
    • lunatik
    • pallene

    22 ideas · 3 easy · 3 small · contributor guide · since 2016

  • Learning Equality

    Building equity in education to transform lives

    • python
    • javascript
    • django
    • vue.js

    5 ideas · contributor guide · since 2021

  • Learning Unlimited

    Building excitement for teaching and learning

    • python
    • javascript
    • django
    • html
    • css

    6 ideas · 1 easy · contributor guide · since 2026

  • LibreCube Initiative

    Open Source Space Exploration

    • python
    • rust
    • docker
    • raspberry pi
    • micropython

    contributor guide · since 2021

  • LibreHealth

    Healthcare for Humanity

    • python
    • javascript
    • android
    • java
    • dart/flutter

    contributor guide · since 2017

  • LibreOffice

    LibreOffice is a free and open source office suite

    • python
    • java
    • c++

    6 ideas · contributor guide · since 2016

  • libssh

    The SSH library

    • c
    • git
    • ci
    • ssh
    • sftp

    12 ideas · contributor guide · since 2022

  • Liquid Galaxy project

    We code immersive and interactive apps with GEarth

    • linux
    • android
    • nodejs
    • flutter
    • Google Earth

    1 idea · contributor guide · since 2016

  • LLVM Compiler Infrastructure

    LLVM Compiler Infrastructure

    • llvm
    • c++
    • clang
    • mlir

    108 ideas · 8 easy · 6 small · contributor guide · since 2016

  • Machine Learning for Science (ML4SCI)

    Machine learning applications in science

    • python
    • machine learning
    • c++
    • data analysis
    • artificial intelligence

    70 ideas · since 2021

  • MalariaGEN

    The Malaria Genomic Epidemiology Network

    • python
    • GCS

    4 ideas · contributor guide · since 2026

  • MariaDB

    The fastest growing Open Source Database

    • python
    • c/c++
    • perl
    • databases

    15 ideas · 1 small · since 2016

  • MDAnalysis

    Analysis of molecular simulations data with Python

    • python
    • cython
    • c/c++

    6 ideas · 4 easy · 3 small · contributor guide · since 2020

  • Meshery

    the extensible, collaborative, Kubernetes manager

    • javascript
    • golang
    • kubernetes
    • ai
    • visual design

    6 ideas · contributor guide · since 2025

  • MetaBrainz Foundation Inc

    Open music / book metadata, music recommendations

    • python
    • machine learning
    • perl
    • postgres
    • spark

    13 ideas · 3 easy · 2 small · contributor guide · since 2016

  • MetaCall

    Simplifying the embedding of programming languages

    • python
    • c++
    • rust
    • nodejs
    • docker

    17 ideas · 9 small · contributor guide · since 2021

  • Metaflow

    A human centric machine learning framework

    • python
    • javascript
    • kubernetes

    contributor guide · since 2026

  • Metasploit

    World’s most used penetration testing framework

    • c
    • python
    • postgresql
    • ruby
    • assembly

    2 ideas · contributor guide · since 2017

  • MIT App Inventor

    Anyone can build apps with global impact

    • javascript
    • java
    • gwt
    • swift

    8 ideas · contributor guide · since 2016

  • Mixxx

    DJ Mixing App With Powerful Features For All DJs

    • javascript
    • c++
    • qt
    • pytorch
    • onnx

    9 ideas · 1 easy · 1 small · contributor guide · since 2016

  • MLLAM

    Research software for AI weather forecasting

    • python
    • numpy
    • pytorch
    • xarray
    • Zarr

    4 ideas · contributor guide · since 2026

  • MoFA Org

    Empower extraordinary with Composition AI

    • python
    • rust

    8 ideas · contributor guide · since 2026

  • MoganLab

    Make acedemic writing as nature as breathing

    • c++
    • qt
    • scheme

    2 ideas · contributor guide · since 2026

  • National Resource for Network Biology (NRNB)

    Developing open source tools for network biology

    • python
    • javascript
    • html
    • css
    • LLM

    contributor guide · since 2016

  • Neovim

    hyperextensible Vim-based text editor

    • c
    • lua
    • Zig

    9 ideas · contributor guide · since 2018

  • Neuroinformatics Unit

    Open-source tools for neuroscience and ML

    • python
    • numpy
    • pytorch
    • Scipy
    • napari

    10 ideas · 1 small · contributor guide · since 2025

  • Neutralinojs

    Lightweight cross-platform desktop app framework

    • c
    • javascript
    • node.js
    • c++
    • typescript

    3 ideas · contributor guide · since 2022

  • NixOS Foundation

    Declarative builds and deployments

    • git
    • nix

    15 ideas · 3 easy · contributor guide · since 2024

  • NumFOCUS

    NumFOCUS promotes open source scientific software.

    • python
    • c++
    • r
    • julia

    58 ideas · 1 easy · contributor guide · since 2016

  • omegaUp

    Open CS Education as a catalyst for social change

    • python
    • mysql
    • php
    • typescript
    • vue.js

    6 ideas · contributor guide · since 2018

  • Open Food Facts

    Better food choices for your health & the planet

    • python
    • javascript
    • machine learning
    • perl
    • flutter

    contributor guide · since 2018

  • Open Genome Informatics

    Open access genomics and bioinformatics projects

    • python
    • react
    • r-project
    • graph
    • angular

    6 ideas · contributor guide · since 2016

  • Open HealthCare Network

    Reimagining Healthcare Delivery

    • python
    • django
    • react
    • typescript
    • NextJs

    contributor guide · since 2024

  • Open Robotics

    Open source robotics and a whole lot more!

    • python
    • ros
    • gazebo
    • c++
    • Bevy

    13 ideas · 1 easy · 2 small · contributor guide · since 2016

  • Open Science Initiative for Perfusion Imaging

    Open access resources for perfusion imaging

    • python
    • github

    6 ideas · contributor guide · since 2024

  • Open Science Labs

    The community open to science and technology.

    • python
    • javascript
    • llvm
    • c++
    • docker

    22 ideas · contributor guide · since 2025

  • Open Technologies Alliance - GFOSS

    Promote Open Standards and Open Source

    • javascript
    • c/c++
    • nodejs
    • python 3
    • Machine Learning (ML)

    16 ideas · contributor guide · since 2017

  • Open Transit Software Foundation

    Help make public transit better

    • android
    • java
    • golang
    • docker
    • ios

    4 ideas · contributor guide · since 2024

  • OpenAFS

    An open source distributed filesystem.

    • c
    • python
    • javascript
    • git
    • tcp/udp

    contributor guide · since 2022

  • OpenAstronomy

    Look at the Universe with the power of Open Source

    • c
    • python
    • c++
    • julia

    contributor guide · since 2016

  • OpenELIS Global

    Empowering labs to Ensure Quality Health Care

    • postgresql
    • javascript
    • java
    • react
    • spring

    contributor guide · since 2024

  • OpenMRS

    Write Code, Save Lives.

    • mysql
    • javascript
    • java
    • reactjs
    • fhir

    contributor guide · since 2016

  • OpenMS Inc

    Advancing Algorithms & AI for Biomedical Insights

    • python
    • cython
    • c++
    • pytorch
    • Streamlit

    6 ideas · contributor guide · since 2026

  • OpenStreetMap

    Create and distribute free geodata for the world

    • python
    • javascript
    • c++
    • docker
    • glTF

    16 ideas · 1 easy · contributor guide · since 2016

  • openSUSE Project

    Makers' choice for sysadmins, developers & users

    • python
    • c/c++
    • go
    • ruby
    • reactjs javascript

    contributor guide · since 2016

  • OpenVINO Toolkit

    Make AI inference faster and easier to deploy!

    • python
    • c++
    • arm
    • x86

    1 idea · contributor guide · since 2022

  • OpenWISP

    The Hackable Network Management System

    • python
    • javascript
    • django
    • lua
    • openwrt

    8 ideas · contributor guide · since 2017

  • Oppia Foundation

    Free platform for interactive, tutor-like lessons

    • python
    • google app engine
    • angular
    • typescript
    • Apache Beam

    10 ideas · 2 easy · contributor guide · since 2016

  • OSGeo (Open Source Geospatial Foundation)

    The Open Source Geospatial Foundation

    • c
    • python
    • javascript
    • java
    • c++

    2 ideas · contributor guide · since 2016

  • OWASP Foundation

    No more insecure software.

    • python
    • javascript
    • java
    • ZAP
    • Juice Shop

    5 ideas · since 2016

  • PEcAn Project

    Develop and promote tools for ecosystem modeling

    • r
    • docker
    • api
    • geospatial

    5 ideas · contributor guide · since 2017

  • Pharo Consortium

    Modern and immersive programming language

    • git
    • smalltalk
    • pharo
    • spec
    • SUnit

    contributor guide · since 2017

  • PostgreSQL

    The Most Advanced Open Source Relational Database

    • c
    • python
    • postgresql
    • javascript
    • go

    7 ideas · contributor guide · since 2017

  • preCICE

    The coupling library for multi-physics simulations

    • c
    • python
    • shell
    • c++

    contributor guide · since 2026

  • Processing Foundation

    To empower all people to learn to program

    • javascript
    • java
    • typescript
    • webgl
    • GitHub Actions

    7 ideas · contributor guide · since 2017

  • Project Mesa

    Mesa: Agent-based modeling in Python 3+

    • python
    • gis
    • object oriented programming
    • LLMs
    • network topology

    3 ideas · contributor guide · since 2024

  • Python Software Foundation

    A programming language used for science & more

    • python
    • javascript

    32 ideas · 1 easy · 6 small · contributor guide · since 2016

  • QC-Devs

    Sustainable software for quantum chemistry & more

    • python
    • github
    • c++
    • julia
    • jupyter

    8 ideas · 3 small · contributor guide · since 2024

  • QEMU

    Open source machine emulator and virtualizer

    • c
    • python
    • linux
    • rust

    7 ideas · contributor guide · since 2016

  • Qubes OS

    A reasonably secure operating system

    • c
    • python
    • xen

    15 ideas · 2 easy · contributor guide · since 2017

  • R project for statistical computing

    R software for statistical computing & graphics

    • c
    • javascript
    • c++
    • r-project
    • fortran

    24 ideas · contributor guide · since 2016

  • Rizin

    Rizin reverse engineering framework and toolset

    • c
    • python
    • go
    • c++
    • qt

    12 ideas · 1 easy · contributor guide · since 2021

  • rocket.chat

    Open source communications platform for the AI age

    • javascript
    • typescript
    • node
    • LLM
    • generative ai

    20 ideas · 5 small · contributor guide · since 2017

  • RTEMS Project

    A real-time operating system for Earth & Space

    • python
    • c/c++
    • assembly
    • posix

    3 ideas · contributor guide · since 2016

  • Ruby

    Ruby is an object-oriented programming language

    • c
    • java
    • ruby on rails
    • ruby
    • rubygems

    13 ideas · 3 easy · 3 small · contributor guide · since 2016

  • SageMath

    Open-source mathematics software system

    • python
    • cython

    17 ideas · 5 easy · 2 small · contributor guide · since 2016

  • ScummVM

    Adventure and RPG preservation project

    • python
    • opengl
    • c++
    • assembly
    • sdl

    13 ideas · 2 easy · contributor guide · since 2016

  • St. Jude Children's Research Hospital

    Find cures. Saving children.

    • python
    • rust
    • simd
    • WDL

    4 ideas · contributor guide · since 2025

  • stdlib

    The fundamental numerical library for JavaScript

    • c
    • javascript
    • node.js
    • typescript
    • webassembly

    38 ideas · 4 easy · 11 small · contributor guide · since 2024

  • Ste||ar group

    Shaping a Scalable Future

    • c++
    • hpc

    43 ideas · 6 easy · contributor guide · since 2016

  • Stichting SU2

    Computational Fluid Dynamics and Optimization

    • python
    • c++

    6 ideas · contributor guide · since 2024

  • Submitty

    Homework Autograding and Course Management Tools

    • python
    • postgresql
    • javascript
    • c++
    • php

    2 ideas · contributor guide · since 2018

  • Sugar Labs

    Learning software for children

    • python
    • gtk
    • typescript
    • javascipt
    • LLM

    14 ideas · 1 small · contributor guide · since 2016

  • SW360

    Software supply chain management done right !

    • java
    • react
    • couchdb
    • SpringBoot

    8 ideas · contributor guide · since 2025

  • Swift

    Fast, safe, and expressive programming language

    • c++
    • cmake
    • swift

    12 ideas · 2 small · contributor guide · since 2018

  • SymPy

    SymPy is a Python library for symbolic mathematics

    • python
    • numpy
    • jupyter

    33 ideas · 4 easy · 3 small · contributor guide · since 2016

  • Synfig

    Open-source 2D animation software

    • python
    • c++
    • gtk
    • gtkmm

    5 ideas · 1 small · contributor guide · since 2019

  • TARDIS RT Collaboration

    Exploring supernovae made easy

    • python
    • numba
    • numpy
    • jupyter
    • pandas

    contributor guide · since 2022

  • The FreeBSD Project

    An OS for servers to embedded devices

    • c
    • llvm
    • assembly
    • make
    • POSIX shell

    23 ideas · 2 easy · 1 small · contributor guide · since 2016

  • The Honeynet Project

    Honeypots and Threat Intelligence R&D

    • python
    • javascript
    • django
    • go
    • docker

    11 ideas · 2 small · contributor guide · since 2016

  • The JPF team

    JPF is a Java VM used to verify and debug software

    • android
    • java
    • distributed systems
    • jvm

    4 ideas · contributor guide · since 2016

  • The Julia Language

    A fresh approach to technical computing

    • machine learning
    • julia
    • data science
    • compilers
    • garbage-collection

    73 ideas · 11 easy · 2 small · contributor guide · since 2016

  • The Libreswan Project

    Encrypting the Internet with IKE / IPsec VPN

    • c
    • kernel
    • nss
    • RFCs
    • libevent

    contributor guide · since 2017

  • The Linux Foundation

    Non-profit consortium fostering growth of Linux

    • c
    • linux
    • cups
    • ai
    • fuzz-testing

    2 ideas · contributor guide · since 2016

  • The Mifos Initiative

    End Poverty One Line of Code at a Time

    • android
    • java
    • kotlin
    • spring
    • angular

    contributor guide · since 2016

  • The NetBSD Foundation

    Of course it runs NetBSD

    • c
    • shell script
    • make
    • unix
    • bsd

    13 ideas · contributor guide · since 2016

  • The ns-3 Network Simulator Project

    ns-3 is a simulation tool for computer networks.

    • python
    • django
    • c++

    16 ideas · 4 easy · contributor guide · since 2017

  • The OpenROAD Initiative

    Collaboratively building an OpenROAD ecosystem

    • python
    • verilog
    • c++
    • tcl
    • OpenRoad

    11 ideas · contributor guide · since 2026

  • The P4 Language Consortium

    Evolve the programmable data plane ecosystem!

    • llvm
    • c++
    • linux kernel
    • mlir
    • ebpf

    9 ideas · contributor guide · since 2024

  • The Rust Foundation

    A language empowering everyone

    • python
    • rust

    3 ideas · 1 small · contributor guide · since 2024

  • Tiled

    A flexible level editor for everyone!

    • c++
    • qt

    5 ideas · contributor guide · since 2017

  • Typelevel

    We do functional programming together

    • linux
    • node.js
    • jvm
    • scala
    • wasm

    contributor guide · since 2025

  • UC OSPO

    Amplifying Research Impact through Open Source

    • python
    • javascript
    • c/c++
    • machine learning
    • pytorch

    41 ideas · 2 easy · contributor guide · since 2023

  • Unikraft

    A Fast and Secure Unikernel SDK

    • c
    • xen
    • golang
    • kvm
    • assembly language

    13 ideas · contributor guide · since 2022

  • United Nations Office of Information Communication Technology

    Sustainable future through innovative technology.

    • python
    • javascript
    • css

    contributor guide · since 2026

  • Uramaki LAB

    The User Experience LAB based on IA

    • python
    • javascript
    • html
    • css
    • Firebase

    contributor guide · since 2024

  • VideoLAN

    Open Source Multimedia for everyone!

    • c
    • c++
    • qt
    • assembly
    • video

    33 ideas · contributor guide · since 2016

  • Wagtail

    The powerful Python CMS for modern websites

    • python
    • javascript
    • django

    4 ideas · contributor guide · since 2022

  • webpack

    webpack is the module bundler for web projects

    • javascript
    • typescript
    • node

    contributor guide · since 2018

  • Wikimedia Foundation

    Bringing free educational content to the world

    • javascript
    • html
    • php
    • css
    • Phyton

    10 ideas · 1 small · contributor guide · since 2016

  • Zulip

    Organized chat for distributed teams

    • python
    • django
    • flutter
    • css
    • typescript

    6 ideas · contributor guide · since 2016