Help out your favorite open source projects and become a better developer while doing it.

The Serenity Operating System 🐞

Global Extensible Open Power Manager

Bitcoin Core integration/staging tree

Mod manager for various PC games. Discord Server: https://discord.gg/cYwdcxj if you would like to be more involved

:video_game: GDevelop is an open-source, cross-platform game engine designed to be used by everyone.

DuckDB is an in-process SQL OLAP Database Management System

GNU Radio – the Free and Open Software Radio Ecosystem

Point Cloud Library (PCL)

A lightweight, fast and extensible game server for Minecraft

A lightweight, fast and extensible game server for Minecraft

Yosys Open SYnthesis Suite

Warzone 2100 - a free and open source real time strategy game.

An open-source user mode debugger for Windows. Optimized for reverse engineering and malware analysis.

Cross-platform, customizable ML solutions for live and streaming media.

Widelands is a free, open source real-time strategy game with singleplayer campaigns and a multiplayer mode. The game was inspired by Settlers II™ (© Bluebyte) but has significantly more variety and depth to it.

The user-friendly command line shell.

A virtual machine for executing programs written in Hack.

Background Music, a macOS audio utility: automatically pause your music, set individual apps' volumes and record system audio.

Truly independent web browser

Fritzing desktop application

Mumble is an Open Source, low-latency, high quality voice chat software

Meshtastic device firmware

C++ websocket client/server library

Kodi is an award-winning free and open source home theater/media center software and entertainment hub for digital media. With its beautiful interface and powerful skinning engine, it's available for Android, BSD, Linux, macOS, iOS, tvOS and Windows.

An open-source C++ library developed and used at Facebook.

Shōgun

Stellarium is a free GPL software which renders realistic skies in real time with OpenGL. It is available for Linux/Unix, Windows and macOS. With Stellarium, you really see what you can see with your eyes, binoculars or a small telescope.

SimTK OpenSim C++ libraries and command-line applications, and Java/Python wrapping.

RPG Maker 2000/2003 and EasyRPG games interpreter

ZeroMQ core engine in C++, implements ZMTP/3.1

Go engine with no human-provided knowledge, modeled after the AlphaGo Zero paper.

DEPRECATED! ~~C++ HTML/CSS UI. Supports subset of HTML/CSS. Based on chromium/cobalt.foo without JavaScript overhead. Uses SKIA 2D graphics library. Can be used to build UI for cross-platform app, game or website. Can support browser as HTML5 web framewor

Source code of open-source Colobot: Gold Edition project developed by Epsitec and TerranovaTeam

The blockchain for Smart Media Tokens (SMTs) and decentralized applications.

Powerful, mature open-source cross-platform game engine for Python and C++, developed by Disney and CMU

Fast and minimalist 3D viewer.

Ethereum miner with OpenCL, CUDA and stratum support

A custom launcher for Minecraft that allows you to easily manage multiple installations of Minecraft at once

Don't fork this project (yet) but work from the original sourceforge subversion repository instead until transitioned.

Apache Traffic Server™ is a fast, scalable and extensible HTTP/1.1 and HTTP/2 compliant caching proxy server.

Log file navigator

Cross-platform, graphics API agnostic, "Bring Your Own Engine/Framework" style rendering library.

Data structure and Algorithm (DSA) contributions

Open-source compositing software. Node-graph based. Similar in functionalities to Adobe After Effects and Nuke by The Foundry.

MGen: Windows PC C++ algorithmic music generator laboratory, playing into MIDI port and exporting MIDI

The continuation of the venerable JA2-Stracciatella project.

I2C device library collection for AVR/Arduino or other C++-based MCUs

libheif is a ISO/IEC 23008-12:2017 HEIF file format decoder and encoder.

Compatible client of Ace of Spades 0.75