scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Free, cross-platform 2D game engine powered by Haxe and OpenFL
Cross-platform game engine in Rust
Collection of utilities that interact with the Blooket API / website
Open-DIS implements the IEEE DIS protocol in multiple languages.
Egret is a brand new open mobile game and application engine
Cross-platform 2D game engine
The Objective-C Interactive Simulation Abstraction Layer