Windows only: Have a flash drive that is constantly getting cluttered up with temporary files or system files from another OS? Why manually delete the mess? Automate the cleanup with USBDriveFresher.
We're big fans of automation here at Lifehacker, we've even created a disk-janitor for Windows called Belvedere, because it doesn't make any sense to spend time doing something your computer can do for you.
USBDriveFresher is a simple application. You plug in rules for what kinds of files to delete upon "freshening" and give it some basic guidelines like whether or not to run automatically when a flash drive is plugged in. From there every time the program runs it will check flash drives for garbage files you want removed.
It can be used for local folders too, but you're limited to deleting. If you need to move, copy, or otherwise manipulate a file, we'd recommend checking out Belvedre if you're on Windows or checking out our guide to setting up a self-cleaning Mac with Hazel if you're sporting a Mac.
USBDriveFresher is freeware, Windows only.