Some great designers around the web have released great icons, interface PSDs, and other resources that help make designing iOS apps easier. Enjoy and make sure to thank the creator of whichever resources you use!
Templates & PSDs
Michael Flarup’s icon template is the best one available. Very useful Photoshop actions along with some great textures.
By default UIButtons are my least favorite element in UIKit. So I made a simple button pack to fix that.
Textures & Patterns
This is my favorite patterns website around!
Not necessarily in an iOS style, but it is a huge icon set that has come in handy for me many times.
The quality and volume of icons in The Noun Project is very impressive! They are often great to get ideas of what to represent in your icon.
Signup for my iOS Design Newsletter for more app design tips and articles.