HeeksCAD - HeeksCAD is a free, open source, CAD application - Imports solid models from STEP and IGES files.
FreeCAD - An open-source parametric 3D modeler
LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
SketchUp - 3D for Everyone
JS.Sketcher - Parametric 2D and 3D CAD modeler written in pure javascript
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.