A free/open source client and automation tool for Ragnarok Online
A completely free, open-source, 2D game engine
An OpenGL RTS game engine written in C
3D game engine/framework in C, with Luajit and Python bindings now
A free and open-source Touhou Project fangame
A planetarium software that shows a 3D simulation of the night sky
KildClient is a powerful MUD client with a built-in Perl interpreter
A MUD client for Android, iOS, Linux, Mac OS X and Windows
Joystick mapping for OSX
The ultimate 2D side scrolling engine. NOTE: Moved to GitHUB
GGMud is a cross platform modern MUD client.
open game world to be set in a realistic environment