Countdown Pro 

Countdown Pro is an extremely flexible timer/reminder for your desktop. It comes with a screensaver that can be designed freely. Design your own countdowns, make standalone applications and give them to your friends and colleagues. Countdown Pro can have many countdowns, reminders and notes in one window on your desktop, changing the currently displayed countdown in a given time period - "ticker style".

Get a quick overview over the time left to important events, birthdays etc in the calendar mode.

Countown Pro includes visual themes plus the ability to design your own!