A list of open source projects with links to contribute or donate.
This list is a work in progress. I'm sure I'm missing many great projects. Feel free to send a pull request (just make sure it has a contribution/donation/both link)!
You don't have to be a developer to contribute to your favorite open source projects. Check out this great guide to learn more about other ways you can contribute.
- Audio Editors
- Audio Players
- Documents
- Developer Tools
- Foundations
- FTP Clients
- Graphics
- Multimedia
- Networking
- OS/Distributions
- Other
- Password Managers
- Social
- Text Editors
- Video Software
- Web Browsers
- Ardour - cross platform audio software to record, edit, mix and master audio and MIDI projects
- Audacity - cross-platform audio software for multi-track recording and editing
- WaveShop - multi-tab audio editor with a wide range of effects/functions and several supported file formats
- Clementine - modern music player and library organizer
- MPD - free and open music player server
- OooPlayer - Lightweight music player for Windows
- Rhythmbox - integrated music management application
- Etherpad - web-based collaborative real-time editor
- Evince - document viewer for multiple document formats
- LibreOffice - office suite
- Okular - universal document viewer
- Scribus - a page layout program
- Sumatra PDF - free and open-source document viewer
- Ansible - radically simple IT automation platform
- ConEmu - free and open-source tabbed terminal emulator for Windows
- Flutter - mobile app SDK to help developers and designers build modern mobile apps for iOS and Android
- Fossil - simple, high-reliability, distributed software configuration management system
- Git - distributed version control system
- GitLab - web-based Git repository manager with wiki and issue tracking features
- Mosh - remote terminal application that allows roaming, supports intermittent connectivity, and provides intelligent local echo and line
editing of user keystrokes
- Node-RED - programming tool for wiring together hardware devices, APIs and online services in new and interesting ways
- PuTTy - free and open-source terminal emulator
- Rancher - a complete container management platform
- Refine - an open source React-based framework for building CRUD apps
- VirtualBox - free and open-source hypervisor
- Windows Terminal - tabstyle windows command line/shell tool. Works with Subsystem/WSL and more. Custom look through integrated .json file
- Yaade - Yaade is an open-source, self-hosted, collaborative API development environment
- Dovecot - IMAP and POP3 email server for Linux/UNIX-like systems
- Mail-in-a-box - one-click, easy-to-deploy SMTP+everything else server
- Mailcow - The mailserver suite with the 'moo' – 🐮 + 🐋 = 💕
- Mailu - simple yet full-featured mail server as a set of Docker images
- Mutt - text-based mail client for Unix operating systems
- NeoMutt - command line mail reader
- Apache Software Foundation - non-profit corporation to support Apache software project
- Blender Foundation - nonprofit organization responsible for the development of Blender, an open source 3D content-creation program
- The Document Foundation - non-profit organization that promotes open-source document handling software
- Django Software Foundation - non-profit organization to promote, support, and advance the Django Web framework
- Eclipse Foundation not-for-profit corporation that acts as the steward of Eclipse
- Electronic Frontier Foundation - international non-profit digital rights group
- Free Software Foundation - non-profit organization to support the free software movement
- GNOME Foundation - non-profit organization that coordinates the efforts in the GNOME project
- Internet Archive - non-profit digital library offering free universal access to books, movies & music, as well as 306 billion archived web pages
- JS Foundation - supports some of the most important projects in the JavaScript ecosystem
- KDE e.V. - non-profit organization that represents the KDE community in the legal and financial entities
- Mozilla Foundation - non-profit organization that exists to support and collectively lead the open source Mozilla project
- Open Source Initiative - non-profit organization dedicated to promoting open-source software
- Open Whisper Systems - organization that focuses on the development of the Signal Protocol
- OpenBSD Foundation - non-for-profit corporation, supporting OpenBSD and related projects
- OpenStreetMap Foundation - not-for-profit company which supports the OpenStreetMap project
- Perl Foundation - non-profit organization dedicated to the advancement of Perl through discussion, collaboration, design, and code
- Privacy Guides - non-profit, socially motivated website that provides information for protecting your data security and privacy
- Python Software Foundation - non-profit organization devoted to the Python programming language
- Ruby Central - non-profit organization dedicated to support and advocacy for the Ruby programming language
- Software Freedom Conservancy - not-for-profit charity that helps promote, improve, develop, and defend Free, Libre, and Open Source Software (FLOSS) projects
- Tor Project - not-for-profit organization that is responsible for maintaining software for the Tor anonymity network
- VideoLAN - non-profit organization that develops and promotes open-source multimedia solutions
- Wikimedia Foundation - a nonprofit charitable organization dedicated to encouraging the growth, development and distribution of free, multilingual, educational content, and to providing the full content of these wiki-based projects to the public free of charge
- X.Org Foundation - non-profit corporation chartered to research, develop, support, organize, administrate, standardize, promote, and defend a free and open accelerated graphics stack
- Cyberduck - client for FTP and SFTP, WebDAV, and cloud storage
- FileZilla - cross-platform FTP application
- WinSCP - SFTP, FTP, WebDAV and SCP client for Microsoft Windows
- Blender - 3D Creation Software
- Caesium Image Compressor - advanced compression tool for photos and images (JPG, PNG, GIF)
- FreeCAD - general purpose parametric 3D CAD modeler
- GIMP - raster graphics editor used for image retouching and editing, free-form drawing, converting between different image formats, and more specialized tasks
- ImageMagick - software suite for displaying, converting, and editing raster image and vector image files
- Inkscape - vector graphics editor
- Krita - raster graphics editor designed primarily for digital painting and animation purpose
- LibreCAD - Computer-aided design application for 2D design
- Pinta - program for drawing and image editing
- Kodi - media player software application
- Media Player Classic - light-weight media player for Windows
- MPlayer - media player software
- SMPlayer - cross-platform graphical front-end for MPlayer
- VLC - cross-platform multimedia player and framework
- Apache - cross-platform web server software
- Firezone - self-hosted WireGuard® based VPN Server & Firewall
- FreeNAS - Network Attached Storage software
- Let's Encrypt - free, automated, and open Certificate Authority
- Nextcloud - self-hosted file sync and share and communication app platform
- Nginx - HTTP and mail proxy server
- Nmap - Security Scanner, Port Scanner, & Network Exploration Tool
- OpenNIC - user owned and controlled Network Information Center; alternative DNS network
- OpenSSH - a suite of security-related network-level utilities based on the Secure Shell protocol
- OpenWRT - project for embedded operating system based on Linux, primarily used on embedded devices to route network traffic
- OPNsense - an open source, easy-to-use and easy-to-build FreeBSD based firewall and routing platform
- ownCloud - self-hosted file sync and share app platform
- pfSense - a free, open source customized distribution of FreeBSD specifically tailored for use as a firewall and router that is entirely managed via web interface
- Remmina - feature rich Remote Desktop Application
- sshuttle - Transparent proxy server that works as a poor man's VPN
- Syncthing - peer-to-peer file synchronization
- Tribler - Privacy enhanced BitTorrent client with P2P content discovery
- WireGuard - fast, modern and secure VPN tunnel
- Wireshark - packet analyzer
- Android-X86 - an unofficial initiative to port Google's Android mobile operating system to run on devices powered by AMD and Intel x86 processors
- Arch Linux - a lightweight and flexible Linux distribution
- CentOS - a Linux distribution that attempts to provide a free, enterprise-class, community-supported computing platform functionally compatible with its upstream source
- Debian - a Unix-like computer operating system that is composed entirely of free software
- Fedora - a Linux distriibution developed by the community-supported Fedora Project and sponsored by Red Hat
- FreeBSD - free and open-source Unix-like operating system descended from Research Unix via the Berkeley Software Distribution
- Kubuntu - an official flavour of the Ubuntu operating system which uses the KDE Plasma Desktop
- LineageOS - successor to the popular CyanogenMod ROM
- Linux - an operating system kernel released by Linus Torvalds
- Linux Mint - a community-driven Linux distribution based on Debian and Ubuntu
- NixOS - Purely Functional Linux Distribution
- OpenBSD - Unix-like computer operating system descended from Berkeley Software Distribution
- openSUSE - a Linux-based project and distribution sponsored by SUSE Linux GmbH and other companies
- postmarketOS - a Linux-Based, LTS OS For Android Phones
- Slackware - The oldest maintained Linux distribution geared towards power and stability
- Ubuntu Linux - a Linux distribution based on the Debian architecture
- Xubuntu - an official flavour of the Ubuntu operating system which uses the XFCE desktop environment
- AWStats - free powerful and featureful tool that generates advanced web, streaming, ftp or mail server statistics, graphically
- Common Voice - open and publicly available dataset of voices
- Dub - alternative to Bitly
- FreedomBox - a community project to develop, design and promote personal servers running free software for distributed social networking, email and audio/video communications
- GnuPG - encrypt and sign data and communication
- Huginn - a system for building agents that perform automated tasks for you online
- MediaWiki - wiki software
- MyCroft - Voice Assistant
- OpenSSL - project that provides a robust, commercial-grade, and full-featured toolkit for TLS & SSL
- OpenStreetMap - collaborative project to create a free editable map of the world
- Radicale - CalDAV and CardDAV Server
- Stockfish Chess - UCI chess engine
- Tyk - open source API gateway
- VeraCrypt - disk encryption software for Windows, Mac OSX and Linux
- Yacy - P2P Search Engine
- ZoneMinder - state-of-the-art video surveillance software system
- Bitwarden - password manager
- KeePass - password manager
- KeeWeb - cross-platform password manager compatible with KeePass
- Password Safe - password manager
- Pass - Standard Unix Password Manager
- Mastodon - social network server
- Matrix - open network for secure, decentralized communication
- Pidgin - a universal instant messaging (IM) program
- HexChat - IRC client based on XChat
- Rocket.Chat - the ultimate webchat platform
- Talk - alternative to Disqus
- WeeChat - fast, light and extensible chat client
- Atom - a hackable text editor for the 21st century, built on Electron,
- Code::Blocks - cross-platform IDE that supports multiple compilers including GCC, Clang and Visual C++
- Emacs (GNU) - extensible, customizable, self-documenting real-time display editor
- Kate Editor - a text editor developed by the KDE free software community
- Nano - a text editor for Unix-like computing systems or operating environments using a command line interface
- Notepad++ - a notepad replacement that supports several languages
- Treehouse - a lightweight outliner app you can use in the browser or to build your own custom application.
- Vim - a greatly improved version of the good old UNIX editor Vi
- Visual Studio Code - a code editor redefined and optimized for building and debugging modern web and cloud applications
- Avidemux - video editing program designed for video editing and video processing
- HandBrake - a GPL-licensed, multiplatform, multithreaded video transcoder
- KdenLive - a video editing software based on the MLT Framework, KDE and Qt
- Open Broadcaster Software - streaming and recording program maintained by the OBS Project
- OpenShot Video Editor - a video editor for FreeBSD, Linux, macOS, and Windows
- Shotcut - a free, open source, cross-platform video editor
- VirtualDub - free video tool for basic editing and encoding, including batch processing, mainly geared to AVI files
- Brave - an open source browser project with priority on speed and privacy based on Chromium
- Chromium - an open-source web browser project started by Google
- Falkon - a lightweight multiplatform web browser written in Qt Framework and using its web rendering engine QtWebEngine
- Midori - A lightweight browser using the WebKit rendering engine
- Mozilla Firefox - web browser developed by the Mozilla Foundation
- NetSurf - web browser which uses its own layout engine
- PaleMoon - web browser with an emphasis on customizability
- qutebrowser - a keyboard-focused browser with a minimal GUI
- SeaMonkey - Internet suite
- Tor Browser - a version of Mozilla Firefox that has been modified by the Tor Project for enhanced security and privacy
- Uzbl - a lightweight webkit browser following the UNIX philosophy