Panda.js HTML5 game engine
A virtual joystick for touch capable interfaces.
html5 game engine optimized for rapid development
phina.js is game library
A Joyful 2D HTML5 Game Engine.
JSIso - An HTML5 Canvas Tile Engine
a 2D rigid body physics engine for the web
Super fast HTML 5 2D rendering engine that uses webGL with canvas fallback
Lightweight, fast, interactable 2D HTML5 rendering engine for cross-platform game development.
GameJs is a thin library on top of the HTML canvas element. In addition to the drawing functions it has a set of generally helpful modules for game development.