Estate Agents have long been pioneers of QR codes as they enable window cards and house sign boards to be 'captured' by passing 'punters' on their mobile phones. We now have the ability to add an image to Q-Action cards, which makes them suitable in their native form for quick and dirty particulars about a property, along with a kerbside picture.
If something more sophisticated is required then using the 'Goto' card you can store a word or pdf document behind a QR code. This trick involves using a cloud storage such as Google Docs, making a document shared as 'public' and pointing the Goto Card at its URL.
The real beauty of Q-Action is that you could mix both types of particulars and even switch between them as the Action Card URL, and therefore the QR code image, remains the same.
Internal inspection is strongly advised, so if you are an Estate Agent go to q-action.appspot.com and get a free account to try.