Folderico is a a versatile program that allows you to change icons of any folder you choose. It allows you to change the color and individual icons of folders right from the context menu.

You can denote all of your work folders with a red color to visually differentiate them from other folders, or you could change the icon of your downloads folder from a simple plain folder to one that, say, has a big green arrow on it.

This is a convenient and easy to use program that does the job really well. It is easy to use and I especially like the fact that changed folders with Folderico retain the new icons when transferred to other computers.