You can download these sweet looking tab/tool bar icons for iOS devices right here.
This icon set has been carefully crafted to be pixel perfect on both normal and high resolution iOS devices. The icons contain beautiful shaded portions to give added depth and to highlight icon features.
They are meant to go on the tab bar at the bottom of your app.
You can use them on free and commercial projects!
[via app-bits]
Peter Gate says
You may also check http://www.iconbeast.com for their massive set of iOS tab bar and toolbar icons.