This website showcases possible applications of QR Code recognition on cellphones, with a focus on referencing online resources using QR Codes. You should start by installing the QRMidlet application on your cellphone. Then you can continue with the demo below or create your own QR Codes.
QRMidlet is an application for your cellphone for reading QR Codes
QR Coder is a tool for creating QR Codes
A tool for creating QR Codes optimized for iPhone
The QR Code link demo shows how to reference online resources for easy and direct access on your phone using QR Codes