3D game engine/framework in C, with Luajit and Python bindings now
A simple and easy-to-use library to enjoy videogames programming
A free/open source client and automation tool for Ragnarok Online
Gideros Release version
An OpenGL RTS game engine written in C
The ioquake3 community effort to continue supporting/developing id's
The flexible game engine
Cooperative multiplayer graphical RPG and adventure game
An Ubuntu remix for both new and experienced Linux sophisticates
A Wii-like game that can be controlled using a Nunchuk or a phone.
Chess program
God of War Gameplay Tweaks
0 A.D. is a free, open-source, cross-platform real-time strategy game.
A cross-platform port of Hexen II game.
A promising chess program
A free 3d game for PC that does not limit the player. Fight,Build,Gain
Emulator of the 8-bit computers Sharp MZ-800 / MZ-700
Orx: Portable Game Engine
Nestopia UE
Updated emulator of Forgotten Realms: Unlimited Adventures
A cross-platform, open-source, pure C game engine for mobile game