Here is an iPhone Application Icons package, which will help each iPhone or iPad application developer get their GUI in order. The icons from this package can be used in navigation, tab bars and toolbars of iOS applications.
Downloads: 74722 - Shareware - Download Now
12x12 Free Toolbar Icons pack contains everything you need for your web site or application toolbar
Downloads: 57603 - Freeware - Download Now
A comprehensive collection of interface icons for modern applications and websites. The set covers a wide range of popular topics, while each of its 100 icons comes in a variety of formats (PNG, GIF, BMP, ICO) and resolutions.
Downloads: 64868 - Shareware - Download Now
To make the interface of your educational site as engaging and intuitive as possible, all you need is a collection of Desktop Education Icons. They are readily available online and depict all the commonly used subjects, actions and tasks.
Downloads: 53625 - Demo - Download Now
Chameleon Icon converts images of any format into Windows icons with just a few clicks. Convert any picture or photo in BMP, JPEG, GIF, PNG, PSD, TGA and TIFF format into icons for your Windows desktop, applications, folders, email and ICQ contacts.
Downloads: 61741 - Shareware - Download Now