LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
Hive - Seamless project management and collaboration for your team.
SketchUp - 3D for Everyone
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.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.