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

DuckDB is an in-process SQL OLAP Database Management System

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

Truly independent web browser

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

Point Cloud Library (PCL)

Yosys Open SYnthesis Suite

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

A lightweight, fast and extensible game server for Minecraft

A lightweight, fast and extensible game server for Minecraft

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

GNU Radio – the Free and Open Software Radio Ecosystem

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

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.

Fritzing desktop application

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

C++ websocket client/server library

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

Meshtastic device firmware

Shōgun

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

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.

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.

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

RPG Maker 2000/2003 and EasyRPG games interpreter

Vulkan-based implementation of D3D9, D3D10 and D3D11 for Linux / Wine

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

Code. Music. Live.

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

OpenToonz - An open-source full-featured 2D animation creation software

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

Fast and minimalist 3D viewer.

Data structure and Algorithm (DSA) contributions

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

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

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

The continuation of the venerable JA2-Stracciatella project.