Here is a TabBar Icons For Mobile Apps, which will help each iPhone or iPad application developer get his GUI in order. They are licensed under a Creative Commons Attribution-Share Alike license. You may use the icons for web design also.
Downloads: 48877 - Shareware - Download Now
Design your software products in Microsoft Office 2003 style, common for millions of users, with the help of the Office Style Icon Set. The icons for nearly all possible actions guarantee an effective look for your software.
Downloads: 48568 - Demo - Download Now
If you are looking for an extensive selection of stock icons of a sports theme, this package provides you with many beautifully drawn, full color icons in a variety of different sizes and formats to enrich your applications.
Downloads: 49478 - Freeware - Download Now
Yellow Web Buttons offer a bundle of navigation images for social networks and custom web sites. The icons are easy on the eye, and provide a uniform theme painted in yellow. The delicious buttons for delicious sites:)
Downloads: 49068 - Shareware - Download Now
Smile Icon Set is a ready-made solution for messaging software that will help to spice up communications. It includes original status icons and emoticons for communication applications and WWW. Icons are available in different color depths and sizes.
Downloads: 50002 - Demo - Download Now