Docr - Docr is a free app for the iPhone smartphones that lets its users scan all of their documents into sharp images and, in the end, store them as PDF files.
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.
Scanner Pro - Scanner Pro turns your iPhone into portable scanner in your pocket.
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.
Genius Scan - On The Go.
TurboScan - TurboScan is a new type of document scanning app for smartphone devices using which smartphone users can convert their smartphones into a powerful and full-featured document scanner for all types of text documents.