QRtool

QR-Code widget and shortcode in one QR-Code generator plugin. Use the QR-Code widget in your sidebars or generate QR-Codes in pages and articles by inserting [qr-code] right where you want your QR-Code to be displayed.
The QR Code widget is equipped with configurations for alignment, color (foreground and background), size, margin, error correction of QR-Code and more to suit the needs of your installment.
The shortcode [qr-code] can be extendet with attributes to achieve the same level of customization as with the widget. 
Example: 
[qr-code align=”left” class=”my-qr-code” color=”#000000″ background_color=”#FFFFFF” size=”4″ margin=”4″ level=”M” post_id=”0″]

WPQR QR-Code Generator

QR-Code widget and shortcode in one QR-Code generator plugin. Use the QR-Code widget in your sidebars or generate QR-Codes in pages and articles.

BranimirIvanov

Qr Code Adv generates automatically QR code of your current page or home page and displays it in your sidebar. After installing Qr Code Adv you have to go into wp-admin/widgets.php and drag and drop our plugin Qr Code Adv into your sidebar. Thats it!
There are few options for advanced users to customize QR code design (Qr Code color, background color, title etc)
For experienced QR code advertisers there is an option to input QR Code Raw Data that will allow you to make your code do anything you want (create sms, create email, call some number etc)

Qr Code Adv

Qr code widget plugin for your WordPress sidebar. Qr code Adv displays QR codes of your site or any other external URL

WPQR QR-Code Generator vs Qr Code Adv