We’ll try today to bring some icons to be used for the UI of the iPhone. Like the ones below:

The icons should be grayscaled, as the operating system will take care of all the graphic effects – like the nice aqua gradient, or the background of the button.
Some of the resources presented are free and some are paid, but the prices are not high.
Free:
Glyphish – 130 png icons.

Pixelpressicons.com – a free set for commercial or personal usage.

glyFX.com – 5 free icons

app-bits.com – 48 free icons

Paid:
A set of 160 icons.

Icondock.com has 2 sets of icons
Rocky, a vector set containing 290 icons

and Simply bold, another vector with over 150 icons.

A set of 328 icons both available in pixel or vector format.

Kombine.com – 130 png icons

Paid or not, this sets of icons can save you time and money in the process of creating an iPhone application. Share yours.
