Voxel game-creation platform with easy modding and game creation
Cross-platform game engine in Rust
New Godot bindings for Swift
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
Open source library for creative expression on the web, desktop, etc.
Urho3D Game engine
Egret is a brand new open mobile game and application engine
2D physics engine for games
Visual Novel engine, editor and game development.