Icon: Themes for all purposes

A clipart, a scheme of colors, a logo or a mascot, all these can be defined as an icon. Who would not want people to recognize their brand, their style and their brilliance by just remembering an image? Names can slip out of your mind, words can be blinded in your eyes but an icon is always there to stay.
This list provides you with the best resources on the web that can help you come up with your own icon for your new business, club or any other thing you might think of. These websites can help you find an icon that suits your needs. Find an Icon for all ages and for all purposes, even for your college projects and assignments! An icon can help you say things easier and faster.
Know of any other web site that can add value to the Icon list? Add it to the sites below along with a summary for each.