This is a 3D scanner using ordinary webcam:
http://www.engadget.com/2009/11/23/cambridges-proforma-does-3d-scanning-with-any-stationary-webcam/
The author web site is this:
http://mi.eng.cam.ac.uk/~qp202/
He promised to release a demo version to Linux and soon a demo for Windows, but he didn’t release nothing until now.