Blender - Blender is the open source, cross platform suite of tools for 3D creation.
progeCAD - progeCAD is DWG/DXF-native CAD software, built for professional drafting.
Sculptris - Sculptris: Enter a world of digital art without barriers.
BricsCAD - A powerful CAD platform, with features familiar to you from native .dwg applications.
ZBrush - ZBrush is a digital sculpting and painting software solution.
MicroSurvey Software - MicroSurvey CAD is a full-featured CAD package that lets you do everything from creating point clouds to designing complex survey networks.