Blender - Blender is the open source, cross platform suite of tools for 3D creation.
MeshLab - System for processing and editing 3D triangular meshes, provides a set of tools for editing...
noesis - Rich Whitehouse's project web site.
Autodesk FBX Review - FBX Review is a lightweight, standalone software tool for viewing 3D assets and baked animations...
MilkShape 3D - The MilkShape 3D website has been down for almost one week.
SketchUp - 3D for Everyone