OpenSCAD - OpenSCAD is a software for creating solid 3D CAD objects.
midas GTS NX - GTS NX is a next-generation geotechnical analysis software that features the newest development in cutting-edge computer graphics and analysis technology.
LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
Abaqus Unified FEA - Finite Element, Multiphysics, and Simulation Software
FreeCAD - An open-source parametric 3D modeler
midas Gen - Structural Analysis and Design