Moodle Plugins directory: QR code: Stats | Moodle.org
QR code
Blocks ::: block_qrcode
Maintained by 
Learnweb – University of Münster, 
Thomas Niedermaier
A Moodle block to display a QR code link that leads to the course page. The QR code can be downloaded by teachers, e.g. to put them into introductory slides. A custom logo can be shown within the QR code.