SEA3D - An open-source format and tools for game developers 🎮 http://sunag.github.io/sea3d/
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
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.
noesis - Rich Whitehouse's project web site.
Autodesk Maya - Maya is 3D computer animation software with powerful modeling, rendering, simulation, texturing, and animation tools for artists, modelers, and animators.