LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
IGiS CAD - 2D Drafting & 3D Modelling Redefined with IGiS CAD
FreeCAD - An open-source parametric 3D modeler
BeckerCAD - The professional CAD software which meets the highest requirements.
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SolidWorks - Dassault Systèmes SolidWorks Corp. develops and markets 3D CAD design software, analysis software, and product data management software. SolidWorks is the leading supplier of 3D CAD product design engineering software.