Beautiful Free Icons for iPhone & Web Applications. Very well designed and highly optimized to use in iPhone Applications, these Free Icons are also perfect for Android apps, websites, t-shirts, tattoos and more.
These Free Icons are 24-bit PNG images used as a mask to generate selected and unselected button states. Dimensions should be about 30×30 pixels for tab bar icons and about 20×20 pixels for toolbar and navigation icons.
Website: http://glyphish.com/