Avogadro libraries provide 3D rendering, visualization, and analysis
Helix Toolkit is a collection of 3D components for .NET
A modern library for 3D data processing
The open source mesh processing system
A python module for scientific analysis of 3D data
Tools to process and visualize scientific data and images
An interactive viewer for three-dimensional chemical structures.
A real-time 3D Engine written in Ada
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
Support for legacy OpenGL in core profiles
Interactive 3D Layout Viewer for GDSII
Realtime raytracer using SIMD on ARM, MIPS, PPC and x86
3D Without Boundaries
rayshade and POV for Mathematica Export + view
For building cross-platform 3D geospatial apps in Java
Viewer and exporter for Unreal Engine 1-4 assets
Tao3D is a programming language for real-time interactive 3D
A real time global illumination solution that achieves glossy surfaces
A declarative 3D globe data visualization library built with Three.js