Babylon.js
Babylon.js: a complete JavaScript framework for building 3D games with HTML 5 and WebGL
Rot.js
ROguelike Toolkit
Nipplejs
A virtual joystick for touch capable interfaces.
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.
Panda.js
Panda.js 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.
Joy.js
A Joyful 2D HTML5 Game Engine.
Verlet JS
A simple Verlet physics engine written in javascript
Enchant.js
A simple JavaScript framework for creating games and apps
Black
World's fastest HTML5 2D game engine 🛸
Phina.js
phina.js is game library
Cutjs
Lightweight, fast, interactable 2D HTML5 rendering engine for cross-platform game development.
Blend4 Web
Blend4Web is a tool for interactive 3D visualization on the Internet
Tmlib.js
JavaScript をより使いやすく, より便利に, そしてより豊かに.
Flash JS
JavaScript graphics and games engine with API familiar to Flash one. Just look to examples sources.
Isometric
JSIso - An HTML5 Canvas Tile Engine
Canvas Engine
Framework for HTML5 Canvas oriented 2D video games