A python module for scientific analysis of 3D data
Wings 3D is an advanced subdivision modeler
NETGEN is an automatic 3d tetrahedral mesh generator
SOLVESPACE is a free (GPLv3) parametric 3d CAD tool.
Design your own pottery for 3D printing in full color
Free 3D Mobile CAD
Fix STL files for 3D printing
3D Engine with some extra features based on the D3x3D Engine for VB6