MegaCellX

MegaCellX is a powerful tool to manage calls, contacts and SMS messages of your mobile phone. It's easy-to-use as an e-mail client and it integrate the Apple iApps like AddresBook, iTunes, DVDPlayer, QuickTime Player and iChat.

You can use AppleScript events to extend the integration with other applications. The user-friendly interface makes backup and store tasking easy for mobile's contacts and SMS messages as well.