XNote Stopwatch - Try the most feature-rich stopwatch and timer software on the net for free!
Timer Tab - Online countdown timer, alarm clock, and stopwatch.
Stopwatch - A Java countdown timer and stopwatch. Features a fullscreen and a resizable window mode.
Gestimer - For those little reminders during the day
TimeLeft - TimeLeft is a versatile desktop utility - it can be used as a countdown clock, reminder, clock...
Online Stopwatch - Online Stopwatch is free to use online tool that allows you to keep track of the important events and tasks that you are performing.