C-Lesh is a game programming language for 2D games.
Javascript adventure game engine
An extensible development framework for roleplay games.
Horror Game Project
Formerly CraveJs, it's for creating JavaScript applications and games.
Simple Point & Click Game
fiftyfifty is a programming language and game
Free MMORPG Engine. Develop and host graphical browser-based games.
Space + Planet Simulation in a voxel-like world