Kaywa Reader is a freeware 2D Barcode Reader application for Nokia S60 and Sony Ericsson mobile devices. Once installed, you can scan 2D Barcodes and the content of the 2D Barcode is then immediately resolved on the phone.

2D Barcodes (Quick Response Code, Datamatrix) can hold several types of information:

-URL
-SMS message
-Phone number
-Any kind of text
-Email address

The URL is certainly the most interesting type of information which can be encoded. After scanning the 2D Barcode, you can get a connection to the mobile site.

Launch the application on your phone then you hover over codes (QR Code or datamatrix). The camera of your phone scans the code and when it can read it, it immediately shows you the response.