A QR Code is a matrix barcode (or two-dimensional code), readable by QR scanners, mobile phones with a camera, and smartphones. The code consists of black modules arranged in a square pattern on a white background.
QR Coder for Outlook is an Outlook add-on that allows you to generate QR Codes for individual appointments, contacts and tasks. You can access it from Outlook Add-ins menu after open the item. This tool uses Google Chart API, as such, Internet access is required.
QR Coder for Outlook has been tested with Windows 7, Outlook 2010 (and above) and .Net Framework 4.0. QR Coder for Outlook is Free for Personal Use. $10.00 to use it in a business environment.