Blender An open source 3D graphics creator. http://www.blender.org/cms/Home.2.0.html
MilkShape 3D A low-polygon modeler, which was initially designed for Half-Life. During the development, many file formats have been added. http://www.swissquake.ch/chumbalum-soft/index.html
3D-Studio Max Software for 3D animation for game development, design visualization, visual effects, and education. http://usa.autodesk.com/adsk/servlet/index?id=5659302&siteID=123112
Maya An integrated 3D modeling, animation, effects, and rendering solution. http://www.alias.com/glb/eng/products-services/product_families.jsp
Vizx3D A 3D editor for X3D and VRML files. http://www.vizx3d.com