A fork of drfrag's fork of GZDoom, with even more optimizations and new features

fheroes2 is a recreation of Heroes of Might and Magic II game engine

Ports of useful libraries to PS2SDK

A purist Quake source port that restores the original look and feel of v1.09 and earlier.

The Continuation of Unofficial Open PS2 Loader by @Krahjohlito as wOPL!

SDL-based reimplementation of the classic Chinese-language RPG known as PAL.

A continuation of the OpenLiero project

A modern source port of Duke Nukem 3D focused on clean code, portability, and performance improvements.

An enhancement ONScripter project porting to many platforms, especially web.

RXGL - OpenGL 1.x Shim for Original Xbox (NV2A / D3D8)

l'Abbaye des Morts - ported to Linux, Pandora, GCW0, Wii and PSP

Game and app loader for Sony PlayStation 2

Odamex - Online Multiplayer Doom port with a strong focus on the original gameplay while providing a breadth of enhancements.

Another World/Out of This World engine reimplementation (SDL, OpenGL)

Reverse engineering Supaplex

SDL Mixer X (Or "MixerX" shortly) - An audio mixer library based on the SDL library, a fork of SDL_mixer

The full port of the SMBX engine from VB6 into C++ and SDL2, FreeImage and MixerX

A fan-made multiplayer Super Mario Bros. style deathmatch game

XBMC is free and open source home theater/media center software and entertainment hub for Original Xbox.

SMB2/3 userspace client

micro-smb2 client for tiny systems

Multiplatform Sudoku game, made with C++/SDL2

Decompilation of Cave Story (v1.0.0.6)

A CPU-only, from-scratch 3D game written in C, where you dodge blocks