DAZ 3D - Daz 3D, 3D Models, 3D Animation, 3D Software
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
open3mod - A free, Open-Source 3D Viewer designed to make it all easier. Massive 3D Format support
MakeHuman - MakeHuman is a free, open source, interactive modeling tool for creating custom 3D human characters.
cmftStudio - GUI counterpart of cmft - cross-platform open-source cubemap filtering tool.
Character Creator 3 - Character Creator 3 is a full character creation solution.