Phaser
Phaser is a light-weight 2D game framework for making HTML5 games for desktop and mobile browsers
Pixi.js
Super fast HTML 5 2D rendering engine that uses webGL with canvas fallback
Crafty
Crafty is a JavaScript game library that can help you create games in a structured way.
Blend4 Web
Blend4Web is a tool for interactive 3D visualization on the Internet
Superpowers Core
:octopus: Superpowers — Extensible HTML5 app for real-time collaborative projects
Nipplejs
A virtual joystick for touch capable interfaces.
Joy.js
A Joyful 2D HTML5 Game Engine.
Kiwi.js
Kiwi.js is a blazingly fast mobile & desktop browser based HTML5 game framework. It uses CocoonJS for publishing to the AppStore.
Phina.js
phina.js is game library
Gamejs
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.
Turbulenz Engine
Turbulenz is a modular 3D and 2D game framework for making HTML5 powered games for browsers and mobile devices.
Easystar.js
An asynchronous A* pathfinding API written in Javascript.
PhysicsJS
A modular, extendable, and easy-to-use physics engine for javascript
Panda.js
Panda.js HTML5 game engine
Tmlib.js
JavaScript をより使いやすく, より便利に, そしてより豊かに.
Playground
Playground.js is a framework for your javascript based games. It gives you out-of-box access to essentials like mouse, keyboard, sound and well designed architecture that you can expand to your needs.
Frozen
Frozen is an open-source HTML5 game engine delivering ease-of-use, rapid development through tooling and modularity.