Advanced Render Manager
Simple to use headers only library
3D File format viewer/explorer
ITK-SNAP static builds for Windows 64-bit(only one file)
simple 3d scene viewer for windows/linux/android
Interactive visualization of DTI, HARDI and other complex imaging data
A program that can be used to generate normal maps from images .
Simple 3D viewer
QCSS Player by Shuffle
https://github.com/horde3d/Horde3D
A Lightweighted Toolkit For Volume Rendering
osGraphX is a 3D file viewer based on openscenegraph.
Bruno's RAY Tracing Engine