Free and open source pattern design software
a parametric 3D CAD modeler
DXF2GCODE: converting 2D dxf drawings to CNC machine compatible G-Code
LibrePLM integrates CAD editors in Odoo / LibrERP
The FAS plugin for the upcoming systems modeling standard SysML v2
Python script for calculation of deflection of elastic ropes.
Software for electromagnetic simulation
Python tool for section property evaluation and stress calculation
Open Source Planar Linkage Mechanism Simulation and Synthesis Software
OpenNum lets you distribute solvers with a nice graphical interface
Open Knowledge on engineering development.
An Open source Analysis and SImulation Toolbox for Fuel Cells
Open Source FabLab Project
dedalo is a 2d cad drawing software written in python3.