Don't name a freeware that most of us are familiar with like Spybot, Open
Office, ect but something you use whether it be a game, screensaver, utility or
whatever that others may not be aware of.
I have to go with "Screen Saver Control." This is great if you need to start
your screensaver or powerdown your monitor immediately.
Also another small program called "shut down". Just set the timer and your
computer will shut down at that time. great for downloading and defrag.
both can be found at this freeware site under system utilities
http://www.webgrid.co.uk/