Melon JS
a fresh & lightweight javascript game engine
Rot.js
ROguelike Toolkit
Verly.js
:red_circle::wavy_dash::large_blue_circle::wavy_dash::black_circle: Easy to integrate Verlet physics engine. :link:
Babylon.js
Babylon.js: a complete JavaScript framework for building 3D games with HTML 5 and WebGL
Turbulenz Engine
Turbulenz is a modular 3D and 2D game framework for making HTML5 powered games for browsers and mobile devices.
Superpowers Core
:octopus: Superpowers — Extensible HTML5 app for real-time collaborative projects
Nipplejs
A virtual joystick for touch capable interfaces.
Blend4 Web
Blend4Web is a tool for interactive 3D visualization on the Internet
Easystar.js
An asynchronous A* pathfinding API written in Javascript.
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.
Pixi.js
Super fast HTML 5 2D rendering engine that uses webGL with canvas fallback
Flash JS
JavaScript graphics and games engine with API familiar to Flash one. Just look to examples sources.
Cutjs
Lightweight, fast, interactable 2D HTML5 rendering engine for cross-platform game development.
Matter JS
a 2D rigid body physics engine for the web
Kiwi.js
Kiwi.js is a blazingly fast mobile & desktop browser based HTML5 game framework. It uses CocoonJS for publishing to the AppStore.
Coquette
A micro framework for JavaScript games
Keydrown
A JavaScript key state handler for web apps