Realtime raytracer using SIMD on ARM, MIPS, PPC and x86
Viewer and exporter for Unreal Engine 1-4 assets
3D .NET engine for Windows, Linux, Mac
Design and Display Happy Cube solutions
shader editor
A world editor for HGE game engine written in python and uses OpenGL.
Gimpel3D - 2D/3D Stereo Conversion Editor
VB6 Raytracer
https://github.com/horde3d/Horde3D