Profilactic is a digital lifestyle aggregator that makes it easy to keep up with all of the content you and your friends create online. Aggregate all your online profiles. Mash up all your created content. Aggregate your friends' content. Clip and archive
With the new version of OS X (Leopard) Apple has included some great functionality in Time Machine. Your Mac will automatically backup to an external drive every hour. It includes the ability to recover deleted files in a timeline.