Hourglass - Hourglass is the most advanced simple countdown timer for Windows.
Free Countdown Timer - Free Countdown Timer is a free, full-featured and user-friendly countdown timer for Windows
XNote Stopwatch - Try the most feature-rich stopwatch and timer software on the net for free!
NetTime - nettime is a time & attendance software solution.
T-Clock Redux - T-Clock Redux in an enhanced fork of Stoic Joker's T-Clock 2010 with ISO week number support...
Free Alarm Clock - Free Alarm Clock is a free, full-featured and user-friendly computer alarm clock for Windows.