XNote Stopwatch - Try the most feature-rich stopwatch and timer software on the net for free!
Hourglass - Hourglass is the most advanced simple countdown timer for Windows.
wnr - Better than pomodoro, this timer app balances work and rest.
Free Countdown Timer - Free Countdown Timer is a free, full-featured and user-friendly countdown timer for Windows
TimeLeft - TimeLeft is a versatile desktop utility - it can be used as a countdown clock, reminder, clock...
No Frills Timer - No Frills Timer keeps track of the amount of time you spend connected to the Internet.