Cuppa is a small application for Mac OS X to time your cup of tea as it steeps - it might sound unnecessary to some, but I think it's the sweetest thing ever.
You use it from the Dock: just right-click or control-click on Cuppa's icon and select the beverage you are brewing. Or select a beverage from the Beverages menu (yes, you can do coffee if you're a joe person). Cuppa will begin timing the brew, and you'll see a teabag appear in the cup and gradually darken as the tea steeps. When the tea is done Cuppa will attempt to get your attention by various configurable means. You can also enable a countdown timer that's displayed in the dock icon.
Download here. Runs on OS X 10.3-10.4 (PowerPC or Intel).