XNote Stopwatch - Try the most feature-rich stopwatch and timer software on the net for free!
ClocX - ClocX - freeware analog clock for Windows desktop with many features like calendar, alarms, skins, antialiasing and transparency.
Stopwatch - A Java countdown timer and stopwatch. Features a fullscreen and a resizable window mode.
LClock - Longhorn systray clock program
TimeLeft - TimeLeft is a versatile desktop utility - it can be used as a countdown clock, reminder, clock...
DS Clock - Keep your time synchronized with Atomic Time servers, using customizable digital desktop clock with westminster chimes.