Can transfer files to Evernote, convert, encrypt/decrypt, email, FTP, slice dice, and it chops too! Can also transfer files to other cloud services like SkyDrive or Google Drive. Very much like IFTTT for Dropbox.
Free (up to 250MB) or paid online dashboard that lets you transfer/view/modify files across many Cloud platforms (DropBox, Box.com, Amazon S3, FTP, SkyDrive, Google Drive, etc.)
For $10, this app runs on Windows or Mac and lets iPhones or iPads on the network print to attached printers using AirPrint function on the device, to PDF that automatically opens on the computer, or saved to DropBox. Free 7-day trial.