Diego Inácio has created several geometry tools for Houdini, using Python.
Houdini Engine for Autodesk Maya
SideFX have released Houdini Engine for Maya, with 3ds Max and Unreal versions coming soon.
Houdini 13 Update
Side Effects's latest version of Houdini 13 comes with new particles, finite element solver, lighting workflow and more.
Houdini Demo Reel 2012
Side Effects Software proudly presents the 2012 Demo Reel for Houdini.