Stars
Jo Engine is an open source 2D and 3D game engine for the Sega Saturn written in C under MIT license
An Open-Source port of the 1999 Game "Star Wars Episode 1: Racer"
Steamless is a DRM remover of the SteamStub variants. The goal of Steamless is to make a single solution for unpacking all Steam DRM-packed files. Steamless aims to support as many games as possible.
Tools to set up a quick macOS VM in QEMU, accelerated by KVM.
Tools and documentation for creating custom content for Harmonix games, including RB4 on PS4, and Fuser
The first unofficial NCA builder for Switch titles. Heavily WIP.
A reimplementation of BioWare's Aurora engine (and derivatives). Pre-pre-alpha :P
Tools for programming LÖVE games in Atom.
Cpasjuste / openbor
Forked from DCurrent/openborOpenBOR is the ultimate 2D side scrolling engine for beat em' ups, shooters, and more!
PS4 5.01 WebKit Exploit PoC
(Discontinued) CTR-mode app that loads .nds ROMs natively, not through emulation.
Atmosphère is a work-in-progress customized firmware for the Nintendo Switch.
A collection of SD redirect patches for 3DS games
Opensource crossplatform Fallout 2™ game engine writen in C++ and SDL.
Aleph One is the open source continuation of Bungie’s Marathon 2 game engine.
An open source re-implementation of Chris Sawyer's Locomotion
OpenRW "Open ReWrite" is an un-official open source recreation of the classic Grand Theft Auto III game executable
OpenSC2K - An Open Source remake of Sim City 2000 by Maxis
Real-time, multiplayer railway strategy/management game based on the RailRoad Tycoon I and II games.
A game engine utilising "Tiled" map files
Darwin is the Open Source core of macOS, and PureDarwin is a community project to extend Darwin into a complete, usable operating system.
An open source alternative to Valve's Hammer Editor for the Goldsource engine. (No longer in development)