JotNot Scanner
Converts your iPhone camera into a portable multipage scanner. Uses image processing (similar to that used in flatbed scanners) to automatically remove shadows, correct contrast and adjust white balance, so that your scanned documents come out looking crisp and clear. Scan receipts, whiteboards, business cards and notes into PDF files, then email them or upload to Evernote, Google Docs and more. iPhone or new iPod Touch only (because of camera). Free and paid versions available.