aka ogre v2 - scene-oriented, flexible 3D C++ engine
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
Tools to process and visualize scientific data and images
Support for legacy OpenGL in core profiles
Earth orbits and satellite coverage display in 3D on your laptop.
Interactive 3D Layout Viewer for GDSII
3D Without Boundaries
Viewer and exporter for Unreal Engine 1-4 assets
Tao3D is a programming language for real-time interactive 3D
A declarative 3D globe data visualization library built with Three.js
PyMOL is an OpenGL based molecular visualization system
3D .NET engine for Windows, Linux, Mac
Design and Display Happy Cube solutions
Simple 3D viewer
Pear3DEngine is a modern and modular 3D development framework
Minimalist 3D Scenegraph Management Framework