Fast and lightweight JavaScript game engine built on WebGL and glTF
A development environment focused on modding
Cross-Platform C++ 2D/3D game engine
Solar2D Game Engine main repository (ex Corona SDK)
Open Source real-time strategy game engine for early Westwood games
Godot is a powerful cross-platform game engine
The flexible game engine
Entitas is a super fast Entity Component System (ECS) Framework
A free & open-source 2D sprite editor, made with the Godot Engine
Flax Engine, multi-platform 3D game engine
Simple and light-weight 3D game engine
Simple Beat Saber Mod Installer
Open source reimplementation of GTA San Andreas game engine in Unity
Real Time Strategy game engine supporting early Westwood classics
Sandbox video game with a powerful physics engine
3D and 2D game engine written in Rust
Desktop/Android/HTML5/iOS Java game development framework
A J2ME emulator for Android
Java/JavaFX/Kotlin Game Library (Engine)
Diablo build for modern operating systems
Open source voxel game engine with support for survival and crafting
An iOS & tvOS Frontend for Multiple Emulators
LayaAir is an open-source 2D/3D engine
Multi Theft Auto is a game engine
Open source clone of the Age of Empires II engine