Open-source engine for Heroes of Might and Magic III
Solar2D Game Engine main repository (ex Corona SDK)
A cross-platform, open-source, pure C game engine for mobile game
Urho3D Game engine
New Godot bindings for Swift
Embeddable unity game engine view for Flutter
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
Game engine supporting many 3D/2D formats and graphic effects
A cross-platform 2D game engine
Cross-platform 2D and 3D game engine
Free and Open Game Programming Language for Windows and GNU/Linux
Blueshift is a cross-platform 3D game engine implemented in C++
Portable game engine with main focus on point-and-click adventures
online 4X browser game engine
Egret is a brand new open mobile game and application engine
3D Game engine
Visual Novel engine, editor and game development.