Free and open source pattern design software
Virtual Satellite
Open-Source Shoemaking
Software for electromagnetic simulation
Cross-platform Open-source 2D CAD
A canvas library for generating technical drawings
Design your own pottery for 3D printing in full color
Parallel finite element analysis
Software to analyse 3D and 2D framed structures, also gives matrices
CNC control software
dedalo is a 2d cad drawing software written in python3.
Cuts 3D objects from polystyrene foam (EPS/XPS)