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.
MAXON Announces Partnership with Side Effects Software
MAXON has announced a partnership with Side Effects Software.
SideFX have announced Houdini Engine, an API that will facilitate Houdini integration into proprietary studio software.