Beatler
It checks all new releases and charts against your purchase history.
Beatler is a native Mac OS X client for the leading DJ music download site Beatport and also a complete replacement for the Flash based interface provided by Beatport, offering several advanced features to enhance your music buying experience and not only.
This application checks all new releases and charts against your purchase history and flags-up any items that involve an artist, label or genre you have bought before and even helps you to download your new purchases and have the tracks automatically placed in the desired directory hierarchy.