Notification Control - an easy way to clean up mess email notification from some social networking sites.
Imo - this well know multi-platform free instant messaging website adds more social networking services.
6Scan - offers a plan to protect your web site that against hackers.
Albums To PDF - a web based application that helps you export your and your friends' Facebook albums to a PDF file.
Text Drop App - a web based application that allows you create text files, and save them to your DropBox.