Hourglass - Hourglass is the most advanced simple countdown timer for Windows.
Online Alarm Kur - Free online alarm clock, set alarm easily on your computer using the internet alarm clock without downloading any software, wake up in time with the loud online alarm clock.
SnapTimer - SnapTimer is a simple, free, portable countdown timer for Windows.
TIMEBOX - An advanced timer for professional meeting facilitators
wnr - Better than pomodoro, this timer app balances work and rest.
TimeMe - TimeMe is a multi-functional timer designed for sports training and workouts, cooking, school breaks, and coffee breaks.
Stopwatch is best for manage time.
I recommend - Online Stopwatch and Timers.