progeCAD - progeCAD is DWG/DXF-native CAD software, built for professional drafting.
SketchUp - 3D for Everyone
BricsCAD - A powerful CAD platform, with features familiar to you from native .dwg applications.
Autodesk Revit - Autodesk Revit is building information modeling software for architects, structural engineers, MEP engineers, designers, and contractors.
MicroSurvey Software - MicroSurvey CAD is a full-featured CAD package that lets you do everything from creating point clouds to designing complex survey networks.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.