Free and open source pattern design software
conducteö - logiciel de calcul des ponts thermiques linéiques
FEATool Multiphysics is an easy-to-use FEA and CFD Simulation Toolbox
CFDTool - Easy to Use Computational Fluid Dynamics (CFD) Toolbox
Cross-platform Open-source 2D CAD
Free 3D Mobile CAD
A package for Isogeometric Analysis in Octave and Matlab