Godot is a powerful cross-platform game engine
Fast and lightweight JavaScript game engine built on WebGL and glTF
Xash3D FWGS engine
Cross-platform 2D and 3D game engine with modular architecture
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Flax Engine, multi-platform 3D game engine
Cocos simplifies game creation and distribution with Cocos Creator
The flexible game engine
A game engine with an emphasis on real-time cutting-edge solutions
Zig game engine & graphics toolkit
Cross-Platform C++ 2D/3D game engine
Multi-platform 2D and 3D game engine
Injectable LUA scripting system, SDK generator, live property editor
An OpenGL RTS game engine written in C
Solar2D Game Engine main repository (ex Corona SDK)
A grid based movement engine compatible with Phaser3
UCI chess engine
Open source voxel game engine with support for survival and crafting
A modern cross-platform low-level graphics library
Unreal Engine Archives Explorer
LayaAir is an open-source 2D/3D engine
Open 3D Engine (O3DE) is an Apache 2.0-licensed multi-platform 3D
Simple Beat Saber Mod Installer
Scripting platform, modding framework and VR support for RE Engine
A Flutter based game engine