QRcode views and portlet for Plone.
There is also a related viewlet. The main purpose for this will when printing the page. You can enable the viewlet by adding medialog.qrcode.interfaces.IqrcodeLayer to your content.
There is also a dexterity behavior.
This product adds a browser view that generates a QRcode for the given page. It also adds a portlet that will show a QR code. The portlet has an option for hiding it for anon users.
Use the browser view like this:
Or: http://mysite.com/@@qrimage?url=http://somewhere.com/somepage To get a qrcode for url=http://somewhere.com/somepage
If the browser view is used on an ATlink object with external link, you will get the QR-code for that URL.