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Inventor - Inventor is a 3D CAD software that lets you quickly create 3D models with embedded intelligence, intuitive workflows, and optimized performance.
FreeCAD - An open-source parametric 3D modeler
SketchUp - 3D for Everyone
Ayam - Ayam is a free 3D modelling environment for the RenderMan interface, distributed under the BSD...
LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
SolidWorks Simulation - Simulation solutions for SOLIDWORKS® provide an easy-to-use portfolio of analysis tools for predicting a product’s real-world physical behavior by virtually testing CAD models.