Solar2D Game Engine main repository (ex Corona SDK)
Desktop/Android/HTML5/iOS Java game development framework
One framework for creating powerful cross-platform games
A game engine powered by python and panda3d
Multi-platform Engine for Desktop, XBOX (UWP) and Mobile games
Cocos simplifies game creation and distribution with Cocos Creator
The source code to VVVVVV
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Multi-platform 2D and 3D game engine
Java/JavaFX/Kotlin Game Library (Engine)
Voxel game-creation platform with easy modding and game creation
Cross-platform game engine in Rust
Free game engine for development of desktop, mobile, and web games
New Godot bindings for Swift
Gideros Release version
Stride (formerly Xenko), a free and open-source cross-platform C# game
Open source library for creative expression on the web, desktop, etc.
Free, cross-platform 2D game engine powered by Haxe and OpenFL
3D Game engine with editor
KorGE Game Engine. Multiplatform Kotlin Game Engine & Korlibs
3D Procedural Game Engine Using OpenGL
Do virtual gear shifting (and more) in any rider app
A simple and easy-to-use library to enjoy videogames programming
Zig game engine & graphics toolkit
The Open Toolkit library is a fast, low-level C# wrapper for OpenGL