Diego Inácio has created several geometry tools for Houdini, using Python.
Tea and Cookies in Houdini - Tutorial
Tea and Cookies in Houdini is a two part commercial tutorial in Houdini, going through all the steps of the scene's creation.
See the new features and improvements in Side Effects Software's fresh release of Houdini 12.5.
Orbolt - Smart 3D Asset Store
Side Effects Software have released a brand new Smart 3D Asset Store called Orbolt.