I just bought the UI design bundle at stacksocial. I'd say it's a steal at the price it's going for now at 88% off the original. It's got some really nice elements and definitely a good starting point if you're looking to develop iOS apps. I know making the design 'feel' right can be really tricky.
I'd also recommend design ammo for a little more inspiration too!
I'd also recommend design ammo for a little more inspiration too!