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.
SideFX have announced Houdini Engine, an API that will facilitate Houdini integration into proprietary studio software.
See the new features and improvements in Side Effects Software's fresh release of Houdini 12.5.