Open-source engine for Heroes of Might and Magic III
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
Solar2D Game Engine main repository (ex Corona SDK)
The game engine for everyone
Kotlin extensions for the libGDX game framework
Cross-platform game engine in Rust
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Free, cross-platform 2D game engine powered by Haxe and OpenFL
A completely free, open-source, 2D game engine
Cross-Platform C++ 2D/3D game engine
Game engine supporting many 3D/2D formats and graphic effects
Embeddable unity game engine view for Flutter
2D game development library for Ruby and C++
Urho3D Game engine
A cross-platform, open-source, pure C game engine for mobile game
Engo is an open-source 2D game engine written in Go
Blueshift is a cross-platform 3D game engine implemented in C++
Open-source, cross-platform, C++ game engine for creating 2D/3D games
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
Educational framework for OpenGLES, OpenCL and OpenAL
2D physics engine for games
OSGET is the first open source mobile game engine template.