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

Godot Engine – Multi-platform 2D and 3D game engine

ClickHouse is a free analytics DBMS for big data

ClickHouse is a free analytic DBMS for big data.

Compatibility tool for Steam Play based on Wine and additional components

MuseScore is an open source and free music notation software. For support, contribution, bug reports, visit MuseScore.org. Fork and make pull requests!

The Swift Programming Language

This is the official source code of FreeCAD, a free and opensource multiplatform 3D parametric modeler. Issues are managed on our own bug tracker at https://www.freecadweb.org/tracker

🍃 Organic Maps is a free Android & iOS offline maps app for travelers, tourists, hikers, and cyclists. It uses crowd-sourced OpenStreetMap data and is developed with love by MapsWithMe (MapsMe) founders and our community. No ads, no tracking, no data coll

An Open Source Machine Learning Framework for Everyone

Nix, the purely functional package manager

Mixxx is Free DJ software that gives you everything you need to perform live mixes.

Notepad++ official repository

Open Source Computer Vision Library

Algorithms that run our universe | Your personal library of every algorithm and data structure code that you will ever encounter

Complete Open Source and Modular solution for MMO

YugaByteDB is a high-performance, transactional database for building distributed cloud services. It currently supports Redis API (as a true DB), Cassandra API and SQL is coming very soon.

Ceph is a distributed object, block, and file storage platform

Animated sprite editor & pixel art tool (Windows, macOS, Linux)

Official doxygen git repository

Cloud-native high-performance edge/middle/service proxy

Cataclysm - Dark Days Ahead. A turn-based survival game set in a post-apocalyptic world.

A library that provides an embeddable, persistent key-value store for fast storage.

The new Windows Terminal and the original Windows console host, all in the same place!

Audio Editor

Cocos2d-x is a suite of open-source, cross-platform, game-development tools utilized by millions of developers across the globe. Its core has evolved to serve as the foundation for Cocos Creator 1.x & 2.x.

Cross-platform music production software

An open source re-implementation of RollerCoaster Tycoon 2 🎢

TrinityCore Open Source MMO Framework (master = 7.3.5.26124, 3.3.5 = 3.3.5a.12340)

Gazebo classic. For the latest version, see https://github.com/gazebosim/gz-sim

The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)

Convert HTML to PDF using Webkit (QtWebKit)

The open-source database for the realtime web.

DuckDB is an in-process SQL OLAP Database Management System

Caffe: a fast open framework for deep learning.

Zcash - Internet Money

A powerful cross-platform raw photo processing program

Multi Theft Auto is a game engine that incorporates an extendable network play element into a proprietary commercial single-player game.

openFrameworks is a community-developed cross platform toolkit for creative coding in C++.

Memory hacking library for Dwarf Fortress and a set of tools that use it

KeePassXC is a cross-platform community-driven port of the Windows application “Keepass Password Safe”.

A PSP emulator for Android, Windows, Mac and Linux, written in C++. Want to contribute? Join us in #ppsspp on freenode (IRC) or just send pull requests / issues. For discussion use the forums on ppsspp.org.

G-code generator for 3D printers (RepRap, Makerbot, Ultimaker etc.)

Space exploration, trading, and combat game.

Flexible level editor

A flexible level editor

A fast JSON parser/generator for C++ with both SAX/DOM style API