Readdle has announced the release of Scanner Pro for free. Scanner Pro is Apple's App of the Week. The app is normally $6.99, so that's quite a savings.
Scanner Pro turns your iOS device into a document scanner. You take a photo, and Scanner Pro detects borders, crops the image, corrects geometry and more. The file can be converted to PDF, uploaded to Dropbox and Evernote, and e-mailed or printed.