Ordinary folders in the Mac OS X Finder are always displayed with the same boring old blue folder icon.
Sometimes you might want to liven this up. Perhaps you browse a music collection through the Finder as well as in iTunes, or have photos that you browse in the Finder as well as in iPhoto. You might create artwork, or own a collection of home movie DVD files. Whatever things you have, one thing is for sure — the standard blue folder icon doesn't give you many clues about the folder's contents.
This is where Add Folder Icons comes in. It uses any pictures found inside a given folder to create a customised icon based on a configurable icon style. There is a set of built-in icon styles and you can create your own.