Free : the open source system for processing and editing 3D triangular meshes.
It provides a set of tools for editing, cleaning, healing, inspecting, rendering,
texturing and converting meshes.
It offers features for processing raw data produced by 3D digitization tools/devices and for preparing models for 3D printing.

http://www.meshlab.net/

So this will be a game's boy! :)

Pilou, thank you for the update.
Note, new Windows version will not install if the old copy of MeshLab is open.
There is a Mac version.
http://www.meshlab.net/#download
- Brian

Thanks Frenchy! Fascinating tute :-)