Here is a freebie for iPhone and iPad application developers. Glyphish.com offers 200 awesome icons for iPhone and iPad applications. The icons are well designed and carefully optimized for iPhone & iPad applications. The icons are also perfect for Android applications, websites, t-shirts, tattoos and much more.
There are two version available free and pro version. Free version comes with 200 icons and size is limited to 1X. It comes with Creative Commons Attribution license. The Pro version comes with 280 icons. The icon sizes are 1X + 2X. The Pro version costs $25. The Pro set requires no attribution.
Free version can be downloaded from Download Free Icons for iPhone & iPad apps. If you wish to buy the pro version check out the Glyphish.com.