"Qrafter is the first QR Code app that is designed for iPad instead of just taking the iPhone version and making it bigger!
Qrafter is a free two-dimensional barcode scanner for iPhone, iPad and iPod Touch. Its main purpose is to scan and parse the contents of QR Codes. It can also generate QR Codes when you purchase the "Pro Pack"."
Tag My Doc is a neat service that allows you to put QR codes on any of your documents. I initially tried it out and reviewed it here last fall. Today, the Tag My Doc team sent me an email announcing some new features which include integration with the cloud storage services Dropbox and Box.