http://entries.the5k.org/365/t.htm An unusual digital clock. This makes a nice display for a pseudo-screensaver.
Today Date and Time
http://www.ecben.net/calendar.shtml Today's date and time, including moon phase and some other interesting information.
http://www.lares.dti.ne.jp/~yugo/storage/monocrafts_ver3/03/index.html A really unusual form of "digital" clock. I always wonder about the eventual stack of eraser crumbs that'd build up, but that's just me.
The Death Clock
http://www.deathclock.com How long will you live? Log on here and find out.