JavaScript 3D library
A modern library for 3D data processing
A python module for scientific analysis of 3D data
Lightweight, high-performance HTML renderer for game developers
3D Engine c++
3D fractal rendering software
3D Graphics by a Lightweight Open-Source Software
rayshade and POV for Mathematica Export + view
STL Viewer for java
Lightweight and modular C++11 graphics middleware for data and games
Coin3D Qt GUI Library
Minimalist 3D Scenegraph Management Framework
https://github.com/horde3d/Horde3D