IronCAD - IronCAD is intuitive 3D CAD software that increases efficiency and can be used standalone or to complement an existing design environment.

Blender - Blender is the open source, cross platform suite of tools for 3D creation.

Inventor - Inventor is a 3D CAD software that lets you quickly create 3D models with embedded intelligence, intuitive workflows, and optimized performance.

Sculptris - Sculptris: Enter a world of digital art without barriers.

Misfit Model 3D - Misfit Model 3D is a 3D model editor that basically operates with triangle-based models.

Ayam - Ayam is a free 3D modelling environment for the RenderMan interface, distributed under the BSD...