LayaAir is an open-source 2D/3D engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
An easy to use 2D HTML5 game engine written in TypeScript
2D JavaScript Physics Engine
A 2D rigid body physics engine for the web
A high-performance, industry-standard 2D physics engine built on Box2D
The Tiny JavaScript Game Engine That Can!
The game engine for everyone
Free, open source game engine online
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
A fresh & lightweight javascript game engine
Ct.js is a desktop game engine that makes learning programming fun
Cocos simplifies game creation and distribution with Cocos Creator
Open source library for creative expression on the web, desktop, etc.
Full featured MUD server with all the trimmings.
Haskell game engine library for roguelike dungeon crawlers
State Management and Multiplayer Networking for Turn-Based Games
Eva.js is a front-end game engine for creating interactive projects
Javascript library for making tile based games
Cross-platform 3D scene editor based on three.js, golang and mongodb
3D C++ Game Engine - yet another open source game engine
2D Game Engine
Web powered cross-platform 3D, WebXR game engine
Starter project to get a Phaser game environment up and running