Fabian Heuwieser has come up with a New Free App! It is called MinuteSaver and what it does is it vibrates after every 55 seconds into each outgoing call so that you know before your new minute will start. It also has options of setting the amount of seconds before you are notified if you choose to change it from 55 seconds.
This sounds like a really usefully app from those who monitor (or need to monitor) their minutes... as you can save minutes by not going over the minute and hanging up before the next minute begins.
It is a very simple app and this is what the menu looks like: