Ze Text Adventure game Builder : Create as you play !
Orx: Portable Game Engine
JavaScript framework to build game engines, games, emulators and apps
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
TurboSphere is an easy to learn and powerful JS based game engine.
Scriptable frontend for media applications.
Cross-platform reimplementation of AMOS BASIC (runtime)