RetroArch is a frontend for emulators, game engines and media players.
Efficient glTF 3D import / export package for Unity
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
A dead simple 2D game engine for Go
A language for fast, portable data-parallel computation
Cross platform Virtual Reality authoring and playback
3D modeler, 3D game maker, 3D demo maker
High performance, cross-platform machine learning for Unity Engine
Lightweight and modular C++11 graphics middleware for data and games
Framework for GPU-accelerated video and image processing
GPU Fragment Shaders Repository - GLSL
iOS framework for GPU-based image and video processing