Arianne is an engine to develop multiplayer online games like Stendhal
A framework to build Pokémon RPG games
Helpful tools to extend the NWN Toolset
General Purpose Engine for Graphic Adventures.
A complete web framework to create online Fighting Fantasy adventures
Lightweight framework for old-school RPG GUI in web!
Simple GUI to create a CYOA Build-logfile.
Cross platform 2D game creation framework with Python bindings