Diego Inácio has created several geometry tools for Houdini, using Python.
Houdini - Demo Reel 2013
Side Effects Software have unveiled the 2013 Houdini Demo Reel.
Nuaghty Dog Turn to Houdini for Uncharted 3
Find out about how Naughty Dog made use of Houdini for geometry fracturing and water effects in Uncharted 3.