Rot.js
ROguelike Toolkit
Babylon.js
Babylon.js: a complete JavaScript framework for building 3D games with HTML 5 and WebGL
Nipplejs
A virtual joystick for touch capable interfaces.
Panda.js
Panda.js HTML5 game engine
Cutjs
Lightweight, fast, interactable 2D HTML5 rendering engine for cross-platform game development.
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.
Verlet JS
A simple Verlet physics engine written in javascript
Limejs
HTML5 game framework for web and iOS
Isometric
JSIso - An HTML5 Canvas Tile Engine
Turbulenz Engine
Turbulenz is a modular 3D and 2D game framework for making HTML5 powered games for browsers and mobile devices.
Kiwi.js
Kiwi.js is a blazingly fast mobile & desktop browser based HTML5 game framework. It uses CocoonJS for publishing to the AppStore.
Joy.js
A Joyful 2D HTML5 Game Engine.
Black
World's fastest HTML5 2D game engine 🛸
Phina.js
phina.js is game library
Enchant.js
A simple JavaScript framework for creating games and apps
Flash JS
JavaScript graphics and games engine with API familiar to Flash one. Just look to examples sources.
Canvas Engine
Framework for HTML5 Canvas oriented 2D video games