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.
Printer Pro - Print attachments, receipts, documents, web pages from your iPad and iPhone.
Scanner Pro - Scanner Pro turns your iPhone into portable scanner in your pocket.
Air Sharing - Air Sharing lets you bring your documents with you — without bringing your computer.
Genius Scan - On The Go.
CalPrint - CalPrint uses your existing reminders and calendar entries on your iPad or iPhone (Exchange, iCal and Google Calendars etc.