XNote Stopwatch - Try the most feature-rich stopwatch and timer software on the net for free!
T-Clock Redux - T-Clock Redux in an enhanced fork of Stoic Joker's T-Clock 2010 with ISO week number support...
Stopwatch - A Java countdown timer and stopwatch. Features a fullscreen and a resizable window mode.
ClocX - ClocX - freeware analog clock for Windows desktop with many features like calendar, alarms, skins, antialiasing and transparency.
Timer and Stopwatch - Online Stopwatch, with start alerts, lap times and sounds. Save details of your timings in a text file.
DS Clock - Keep your time synchronized with Atomic Time servers, using customizable digital desktop clock with westminster chimes.