3D game engine/framework in C, with Luajit and Python bindings now
Arianne is an engine to develop multiplayer online games like Stendhal
Sceneform Maintained is an ARCore Android SDK with Google Filament
A Rust framework for building Minecraft servers
A complete framework for Godot to create beautiful and complex AI
Build Cross-platform Applications
3D .NET engine for Windows, Linux, Mac
Geospatial Web 3D Globe Project(To consider S.Korea market)