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a parametric 3D CAD modeler
DXF2GCODE: converting 2D dxf drawings to CNC machine compatible G-Code
Free and open source pattern design software
A Cross Platform and Open Source Electronics Design Automation Suite
conducteö - logiciel de calcul des ponts thermiques linéiques
An EnergyPlus shell for parametric studies and more ...
Open-Source Shoemaking
FEATool Multiphysics is an easy-to-use FEA and CFD Simulation Toolbox
Python script for calculation of deflection of elastic ropes.
Software for electromagnetic simulation
Cross-platform Open-source 2D CAD
Python tool for section property evaluation and stress calculation
Static and Dynamic Structural Analysis of 2D and 3D frames.
CAD Application entire developed in Python
A canvas library for generating technical drawings
Free CAD software
Open Source Planar Linkage Mechanism Simulation and Synthesis Software
Geometric kernel for CAD programs using an atomic approach
OpenNum lets you distribute solvers with a nice graphical interface