Aelib Houdini Library

Aelib is an open source library of Tools, Presets and Scripts for SideFX Houdini.

It currently contains more than 50 HDA's (Houdini Digital Assets) with functionality for geometry creation, curve manipulation, animation and motion graphics, FX, workflow tools and more. 

https://github.com/Aeoll/Aelib

Video overviews of some tools may be found here https://vimeo.com/user27356169