The English Heritage Members' Magazine has pages you can "blipp".
https://blippar.com/en/
http://www.english-heritage.org.uk/members-area/members-magazine/
The app recognises a page (or a building) and links to content (in the
case of magazine example, some videos).
A flexible replacement (or augmentation) for QRcodes and hence QRPedia?
http://qrpedia.org/
Gordo