UI – Medien Szenen

Exotico UI Set Download the free version here

PSD: Mountain Lion style notification http://nbtk.nu/EMf3

ui-parade: User Interface Design Inspiration Link: http://www.uiparade.com/

Best Free UI PSDs of 2011 http://webdesignledger.com/freebies/best-free-ui-psds-of-2011