Here’s an icon set that’s certainly worth a look. Over 165 Litho system icons for pretty much any program in a comprehensive package. You can download this well designed icon set here.

Here’s a set of pleasing browser icons. This icon pack includes icons for Firefox, Chrome, Opera, Safari, Internet Explorer and Konqueror – take your pick.

Just found this set of 20 highly detailed icons by Smashing Magazine. One of the few icon packs I’ve found which can be used for e-business. You can download these icons here.

Mussett have a extensive range of slick, professionally designed icons. These is probably one of the best collections I’ve come across. Download thee icons here.

Here’s an extensive collection of icons under various categories. You can view the entire icon gallery and download various sizes here.

Stunning set of 20 crisp, well designed icons each with three size variations. Nicely done! You can download the icon set here.

Are you an avid follower of star wars, star trek or one of the other sci-fi series? Well, you’ll drool over these high quality sci-fi icons that cover everything from the Millenium Falcon to the Starfleet academy badge. This icon collection is a must! View here.

Here is a set of clean professionally designed pokemon icons for fans out there. Download here

This is probably the most comprehensive professionally designed icon collection I’ve seen. Check it out here.

And here’s another complete set of icons by talented graphics designer Jordan Michael. The package includes 120 different file extension icons in both png and icon format (31mb). All major file extensions are included. Works best with Vista.

Download Icon Set here