Fast and lightweight JavaScript game engine built on WebGL and glTF
The Tiny JavaScript Game Engine That Can!
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
Cross-platform 3D scene editor based on three.js, golang and mongodb
2D Game Engine
Multi-platform game engine similar to old Megaman with a stage editor
Godot is a fully featured, open source, MIT licensed, game engine.
3D Game engine