Pear3DEngine is a modern and modular 3D development framework
DecoHome3D is a Java application for choosing and placing furniture
Minimalist 3D Scenegraph Management Framework
Real-time 3D visualization of space
QCSS Player by Shuffle
A Fast Light Neuron Tracing and Editor Tool
A small simple system for 3d line drawings in LaTeX.
A Lightweighted Toolkit For Volume Rendering
3D modeling for everybody
https://github.com/horde3d/Horde3D
Collection of scanned/digitized books, tutorials, and source code