TinyAlarm is a tiny alarm clock for your menu bar. It will play your chosen sound at some time in the near future. All of the configuration is done using the status menu item. Clicking around should reveal just about everything there is to know about Tiny Alarm.

TinyAlarm is good for when you're gaming or programming, but still have to get to class. It will also help you avoid missing your bus, or burning your pizza, or showing up late for meetings.