This i a world clock, alarm clock, stopwatch and timer for Mac OS X.
It can display several clocks at once, and each clock can display a different time zone and have its own alarm in its own time zone. Meridian will optionally play a sound or alert you with a custom message when the alarm time is reached. Meridian's stopwatches count up with tenth-of-a-second precision. Timers count down to zero and alert you when they're done.