portable usb-stick version also available. From lifehacker.com: "...Revo Uninstaller makes removing programs from your computer—not just uninstalling, but removing all traces—a quick and painless process. ...the default Add/Remove is notoriously slow at loading all of your installed apps; it also ...doesn't necessarily eradicate the program to your liking."
It differs from other defrag tools on the market, by enabling you to quickly and simply defrag the files you want to, without having to process the whole drive.