Count Down Vibrate в Android Market

Count Down Vibrate (v. 1.0) Разработано Jan Murawski

Count Down Vibrate makes you specify an interval and a final point of time. When started, it will vibrate each <interval> minutes until the specified time.
You will not have to look at your watch in an eye-catching way. Furthermore  more you will not fall asleep in class after a long night.