OptiScaler bridges upscaling/frame gen across GPUs
Reusable code for building video games with Jogamp NEWT
A frontend for GnGeo emulator written purely in Python
ReShade is a generic post-processing injector for games and videos.
Vivid is a modern C++ 3D engine using OpenGL4+
A 2D game engine and level editor
2D ARPG Engine
3D .NET engine for Windows, Linux, Mac
GameWizzard is a Sprite editor.