Map editor for the game Can I Scape
Library for creating turn-based games with simultaneous moves.
A world editor for HGE game engine written in python and uses OpenGL.
MultiLingual Interactive Fiction
Scriptable frontend for media applications.
Open source network game service
NinYawg Adventure
An extensible development framework for roleplay games.
Open Source Virtual World and MMOG Development Platform
Cross-platform 2D game engine
Halo Dark Interface es una Interfaz para Halo Custom Edition
The next generation mud is an open-source extensible, programmable mud