Open-Source Shoemaking
LibrePLM integrates CAD editors in Odoo / LibrERP
Cross-platform Open-source 2D CAD
Open Source Planar Linkage Mechanism Simulation and Synthesis Software
AVR simulator IDE
Free multiphysics simulation software package
Cuts 3D objects from polystyrene foam (EPS/XPS)
Logs IP to IP contact, number of packets, bytes.