Scanner Pro - Scanner Pro turns your iPhone into portable scanner in your pocket.
Photomyne - Scan your old photo albums in minutes; Save your memories forever
Scanbot - Scanbot is a mobile app that allows you to use your device's camera as a document scanner. The app is capable of scanning a large number of source materials, and it can handle QR codes as well.
HP Smart - HP Smart app comes up with features to help you in scanning all the important paperwork using your phone’s camera and connect the device to an HP printer to print the documents on paper.
Genius Scan - On The Go.
DocScan - DocScan is a PDF document scanner application for the iPhone smartphones that lets the users to scan their documents and get them in the PDF files.