ClocX - ClocX - freeware analog clock for Windows desktop with many features like calendar, alarms, skins, antialiasing and transparency.
Pzizz - Sleep at the push of a button! Now with "Focus"
LClock - Longhorn systray clock program
Awaken - Wake up to Awaken playing your favorite music.
DS Clock - Keep your time synchronized with Atomic Time servers, using customizable digital desktop clock with westminster chimes.
Enough Sleep - Boost your performance by getting enough sleep!