FreeCAD - An open-source parametric 3D modeler
Rhino 3D - To be an effective designer today, you need tools to quickly develop your designs and accurately communicate them to everyone in the product research.
SketchUp - 3D for Everyone
Catia - CATIA (Computer Aided Three-dimensional Interactive Application) (in English usually pronounced /k?
LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
Onshape - Onshape is the first full-cloud 3D CAD system. It runs in a web browser and on any mobile device.