studioNEST's Melena is a hair styling and simulation framework based on the Autodesk Softimage ICE platform. Its toolset features various hair generation tools, effects as well as custom simulation nodes and forces. By supporting lattices for styling as well as for simulation Melena enables artists to create directable simulations. Melena has been used in production for creating the stylized hair for the No Pets Allowed project that we are working on, and is now released under GPL for download.

http://www.studionestbarcelona.com/opensource/2010/5/3/studionests-melena.html