Fast and lightweight JavaScript game engine built on WebGL and glTF
You can make it - Open Source MMORPG Platform
JavaScript framework to build game engines, games, emulators and apps
A synchronisation component for p5.js
Javascript Canvas Framework
javascript HTML5 game dev lib
Free strategy browsergame engine.
AutoTeach makes kids study and learn in exchange for internet access.
Modular Gaming Open Source Persistent Browser Based Game Framework
Simple and scalable 3d javascript game engine
Powerful html5 & javascript library for creating applications & games.
Investigo - DX9 Performance and Debugging Toolkit
Formerly CraveJs, it's for creating JavaScript applications and games.