Rainbow Folders allows you to change color of the icon representing chosen folder to any color you like. When you're exploring directory which contains lots of subdirectories in Windows Explorer you can easily commit a mistake, e.g. by clicking the folder's icon which have similar name to the one you really wanted to go. When the folders will be marked with the colors of your desire you won't make any mistake and after some time you'll be clicking the right folders by the impulse. You can colorize an unlimited number of folders - each into a different color. Also the effect of colorizing folders is not only visible in Explorer but in whole system, so also in any directory selection tree, and open/save dialog in any Windows application.