MD2 (Quake2) Model Viewer
Free 3D Mobile CAD
Easily creates high complex fractal images. Includes 3D prototypes.
3D Graphics by a Lightweight Open-Source Software
3D rendering and scene graph library (moved to GitHub)
A tool for creating Terrains.
Barracuda3D is a 3Dmodeler + 3Danimator / renderer for Windows
Growth-grammar related Interactive Modelling Platform
Java3D Scene Creator
OpenGL Planets, a solar system simulation.
3D computer models hosted here, in usually .3ds format
A tool to generate Tree sprites and voxels for the Doom game