Fast and lightweight JavaScript game engine built on WebGL and glTF
Solar2D Game Engine main repository (ex Corona SDK)
Open Source real-time strategy game engine for early Westwood games
The flexible game engine
Cross-Platform C++ 2D/3D game engine
Entitas is a super fast Entity Component System (ECS) Framework
A development environment focused on modding
Godot is a powerful cross-platform game engine
Injectable LUA scripting system, SDK generator, live property editor
Flax Engine, multi-platform 3D game engine
Simple and light-weight 3D game engine
Game engine supporting many 3D/2D formats and graphic effects
A free & open-source 2D sprite editor, made with the Godot Engine
Desktop/Android/HTML5/iOS Java game development framework
Sandbox video game with a powerful physics engine
Simple Beat Saber Mod Installer
Real Time Strategy game engine supporting early Westwood classics
LayaAir is an open-source 2D/3D engine
Skript is a Bukkit plugin which allows server admins
Multi Theft Auto is a game engine
fheroes2 is a recreation of Heroes of Might and Magic II game engine
One framework for creating powerful cross-platform games
Open source voxel game engine with support for survival and crafting
Dust3D is a cross-platform open-source 3D modeling software
A complete 3-D game development suite written in Java