Dust3D is a cross-platform open-source 3D modeling software
3D engine with modern graphics
3D Engine with Blender Integration
A Python library for geometric objects in 3 dimentions
HARFANG 3D source code public repository
A tool for creating Terrains.
A tool to generate Tree sprites and voxels for the Doom game
Autorun enabler for Autodesk Inventor VBA projects
It's a direct manipulation parametric curve modeler.
A microscopic pedestrian crowd simulation system and library
3D modeling for everybody