A system tray widget which shows the current date/time in multiple time zones. It also allows the user to display "what time is it in XXX if it's this time in YYY". Available for any Java 6 (or better) platform.
Very nice little piece of software! No bloatware, but does exactly what it's supposed to do. Great!
Top notch world clock. Mouse over system tray clocks (as many as you want) and keep track of the current time anywhere in the world. Super customizable.