The constraints of an iOS application have pushed designers to create some truly incredible icon designs. Below are 25 of my favorite. Not all of them may be practical, but they should force you to think beyond the basic icon for your next application. Each one links back to the artist on Dribbble (except where I couldn’t find the original designer).
If you’re interested in iPhone & iPad design checkout my iOS Design Mailing List for more tips, inspiration, and tutorials.