Create Minecraft bots with a powerful and high level JavaScript API
A high-performance, industry-standard 2D physics engine built on Box2D
LayaAir is an open-source 2D/3D engine
Eva.js is a front-end game engine for creating interactive projects
You can make it - Open Source MMORPG Platform
The Tiny JavaScript Game Engine That Can!
a webgl Cesium 3D flight simulator