Flexible level editor
Map Pixel Art Generator for Minecraft
Open source simulation game based on Transport Tycoon Deluxe
Multi Theft Auto is a game engine
Source code repository of the FreeOrion project
A fast-paced free software rally racing game
Another clone of Rick Dangerous classic game
Cooperative multiplayer graphical RPG and adventure game
Pixel-art map visualizer for Minecraft
... the open-source glide computer
With the helpfull nef, you have to rescue earthlike planets!
A modification for Janes USAF
Cross-platform real-time strategy game (3D)
Synthetic Vision/Sectional Maps for experimental aircraft.
An unmodified version of the MMORPG Impressive Title by KovuLKD
A work-in-progress PlayStation 4 emulator
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
Vivid is a modern C++ 3D engine using OpenGL4+