BlingClock Timer is a nice countdown timer for your desktop, and it can also be used as a stopwatch or clock. The application is very customizable and provides multiple visualization modes. It can be moved all across the screen and it also offers two layout modes: the mini mode, which is an ultra-compact layout that can be placed anywhere on the screen, and the full mode, which runs the timer in full screen. The interface buttons can also be shown in two ways. If you use the clock mode, the time can be displayed in a 24-hour format and with blink separators.
In the registered version, you will also be able to set alarms and select one of the many sounds included or even add your own. What is great is that if you hover the mouse over any of the buttons on the user interface, a small dialogue will be displayed explaining its function.
In short, if you are looking for a very comprehensive countdown timer which can also be used as clock and stopwatch, BlingClock Timer can be a good choice.