FreeCAD - An open-source parametric 3D modeler
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.
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.
Onshape - Onshape is the first full-cloud 3D CAD system. It runs in a web browser and on any mobile device.
SketchUp - 3D for Everyone
Blender - Blender is the open source, cross platform suite of tools for 3D creation.