Simple Road Design and Earthworks
Free and open source pattern design software
Electric Design Tool
very good CAD software
Open-Source Shoemaking
A math-inspired CAD program in haskell. CSG, bevels, and shells
Open source 3D software based on opencascade(CAD)
Arma Design Studio - CAD/CAM Software
2D CAD software
Open Source Planar Linkage Mechanism Simulation and Synthesis Software
Design your own pottery for 3D printing in full color
Dedicated to computer-aided engineering Linux distribution
CT Soft is software designed to be used with Control Techniques Drives
Open Knowledge on engineering development.
dedalo is a 2d cad drawing software written in python3.