I recently found an application for my Blackjack that places a clock in the menu bar. This is extremely useful when you are using the phone for something other than talking and want to know what time it is.
TopClock is a free application that can be used by Windows Mobile 5 or Windows Mobile 2003.
Unfortunately, I am unsure of the name of the person that created the application called TopClock. I believe he's native language is Chinese or Japanese, so talking with him about the application is a little difficult.
He has given me permission to make available his application.
TopClock - Windows Mobile 5 - QVGA