A small MIDI visualizer tool, using OpenGL
GPL software which renders realistic skies in real time
Interactive 3D Layout Viewer for GDSII
Program for molecular graphics
Data Visualization and Analysis
Tao3D is a programming language for real-time interactive 3D
Interactive Visualization Workshop
CueMol - Molecular Visualization Framework
sandbox particle simulator that obeys schrödinger's equation
Pear3DEngine is a modern and modular 3D development framework
A cross-platform OpenGL based lightweight scenegraph library
... the open-source glide computer