Diego Inácio has created several geometry tools for Houdini, using Python.
Houdini for Games - Frima Studio
See how Frima Studio use Houdini to generate content for their games.
SideFX have announced Houdini Engine, an API that will facilitate Houdini integration into proprietary studio software.
Jean Claude Nouchy - Houdini FX TD Showreel
Jean Claude Nouchy has posted his Houdini FX TD showreel, showcasing work from several high tier films.