a parametric 3D CAD modeler
Simple Road Design and Earthworks
3D/2D Concrete Reinforcement in Bentley MicroStation
Demonstrates a quadtree for spatial indexing of triangles
Design your own pottery for 3D printing in full color
2.5D CAD CAM emphasis on CAM and toolpaths
3D CAM program for CNC mills/lathes
Cuts 3D objects from polystyrene foam (EPS/XPS)
Open Source CAD