LayaAir is an open-source 2D/3D engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
ZED OS the clone of Windows XP
Web powered cross-platform 3D, WebXR game engine
Massively multiplayer online game server and client framework
A comprehensive path-finding library for grid based games
Egret is a brand new open mobile game and application engine
An extensible development framework for roleplay games.