I saw this great resource for
PSD & Firework UI templates and thought it may come in handy for some of the designers out there. It is the most comprehensive list that I've seen to date with iPhone, iPad, Android, OS X, BluePrint, Omni Graffle, Flex, Omni Graffle, Aqua, EXT JS....
The list goes on and on and yes I did mix operating systems with design applications. It is just about everything AND the kitchen sink.
Happy designing...
Just in case -
http://www.uniquebrush.com/2010/08/ui-design-free-psd-kits/