iTMS Estimator
This application was inspired by the counter on the iTunes web page.
This is a little application that shows the current estimated total tracks sold on the iTunes Music Store (iTMS) as well as an estimate of the time of the next milestone sale (every 100,000th track).
The application will automatically update its estimate every 5 minutes and, when there are 10 seconds or less until the next estimated milestone sale, the application will beep each second.