Hourglass - Hourglass is the most advanced simple countdown timer for Windows.
Day Counter App - Customizable counting app to track your deadlines, steaks, helps you countdown and remember special moments that matter to you and many more. Works in 2 different modes: count up and countdown.
wnr - Better than pomodoro, this timer app balances work and rest.
Countdown+ - Countdown+ lets you to countdown to your events, birthdays, holidays and any events in your life. Add and Follow your friends and family events to keep track of their events.
Date Reminder - Date Reminder reminds you of recurring or nonrecurring events, like birthdays, bills to pay...
Free Countdown Timer - Free Countdown Timer is a free, full-featured and user-friendly countdown timer for Windows