RenderDoc is a stand-alone graphics debugging tool
Java/JavaFX/Kotlin Game Library (Engine)
The open-asset-importer-library repository
3D modeler, 3D game maker, 3D demo maker
3D Multiplayer Hover Soccer
Cross-platform 2D and 3D game engine
Character animation system for games and simulations.
Realtime 3D engine for game development
3D .NET engine for Windows, Linux, Mac