aka ogre v2 - scene-oriented, flexible 3D C++ engine
An interactive viewer for three-dimensional chemical structures.
Interactive 3D Layout Viewer for GDSII
3D Without Boundaries
Python 3D renderer with wireless display support
rayshade and POV for Mathematica Export + view
Viewer and exporter for Unreal Engine 1-4 assets
Tao3D is a programming language for real-time interactive 3D
PyMOL is an OpenGL based molecular visualization system
A declarative 3D globe data visualization library built with Three.js
Highly accurate ray-tracing software system for UNIX computers
3D Charts - Templates for PovRay(TM)
Pear3DEngine is a modern and modular 3D development framework