a parametric 3D CAD modeler
Free and open source pattern design software
Open-Source Shoemaking
A Cross Platform and Open Source Electronics Design Automation Suite
Demonstrates a quadtree for spatial indexing of triangles
Geometric kernel for CAD programs using an atomic approach
Design your own pottery for 3D printing in full color
Free 3D Mobile CAD
Cuts 3D objects from polystyrene foam (EPS/XPS)
Open Source CAD