BattleTech MUX Client
Final Fantasy 6 SNES Save State and Save Game editor.
Grid-based Java medieval RPG map editor & battle system
Built to be ease of use, with no programming knowledge, Multi-platform
A roguelike game engine/editor
The Map-Editor of the 2D role-playing game Arengu
A retro style video game engine for RPGs and adventure games.
A turn-based strategy game in the spirit of Tactics Ogre
A tool for roleplaying gamemasters
http://www.jingluntianxia.com