Ct.js is a desktop game engine that makes learning programming fun
JavaScript library for creating web-based terminals
Tools and Z80 engine for creating adventure games. (RUST)
Arianne is an engine to develop multiplayer online games like Stendhal
General Purpose Engine for Graphic Adventures.
The core software distribution for the Inform 7 programming language
A complete web framework to create online Fighting Fantasy adventures
A cross-platform interpreter for many point-and-click adventure games
Entex Adventure Vision emulator with debugging capabilities.