Phaser is a light-weight 2D game framework for making HTML5 games for desktop and mobile browsers
phina.js is game library
Lightweight, fast, interactable 2D HTML5 rendering engine for cross-platform game development.
Kiwi.js is a blazingly fast mobile & desktop browser based HTML5 game framework. It uses CocoonJS for publishing to the AppStore.
Framework for HTML5 Canvas oriented 2D video games
a 2D rigid body physics engine for the web
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.
Blend4Web is a tool for interactive 3D visualization on the Internet
JSIso - An HTML5 Canvas Tile Engine
html5 game engine optimized for rapid development
A virtual joystick for touch capable interfaces.
A Joyful 2D HTML5 Game Engine.