CAD.
Linux tiny CAD for educational purposes
Open source Matlab code for nonlinear isogeometric analysis
Open-Source Shoemaking
Application Integration for HPC Multiphysics
OpenNum lets you distribute solvers with a nice graphical interface
A Linux CAD system
Parallel finite element analysis
An easy and flexible mathematical programming environment for Python.
Python library for fab/lab control
Open Source Planar Linkage Mechanism Simulation and Synthesis Software
Open Source CAD
Free CAD software
Cuts 3D objects from polystyrene foam (EPS/XPS)
Python GUI tool for estimating plant CAPEX, OPEX, and profitability
OpenFOAM UI based on web
cppcam is a 3D CAD app for drafting G-Code toolpaths for CNC Routers