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.
Days.To - Count down to holidays and events & share with friends.
Free Countdown Timer - Free Countdown Timer is a free, full-featured and user-friendly countdown timer for Windows
SnapTimer - SnapTimer is a simple, free, portable countdown timer for Windows.