https://boardgame.io/
boardgame.io - Open-Source Game Engine for Turn-Based Games
Open-Source Game Engine for Board Games / Card Games / Tabletop Games
open source game engineturn basedboardgameiogames
https://godotengine.org/
Godot Engine - Free and open source 2D and 3D game engine
Godot provides a huge set of common tools, so you can just focus on making your game without reinventing the wheel.
free and open sourcegodot engine2d3dgame
https://playcanvas.com/
PlayCanvas | Open Source WebGL & WebGPU Game Engine
Build stunning games, 3D visualizations, AR/VR experiences and playable ads with PlayCanvas, the open source JavaScript engine powered by WebGL and WebGPU.
open sourceplaycanvaswebglwebgpugame