Ct.js is a desktop game engine that makes learning programming fun
Tools and Z80 engine for creating adventure games. (RUST)
Arianne is an engine to develop multiplayer online games like Stendhal
A complete web framework to create online Fighting Fantasy adventures
Adventure game prototype for mechanical technicians
A cross-platform interpreter for many point-and-click adventure games
route definition tool
A register-based virtual machine designed to be embeddable.