Wikipedia
QRpedia
QRpedia is a mobile Web based system which uses QR codes to deliver Wikipedia articles to users, in their preferred language. QR codes can easily be generated to link directly to any Uniform Resource Identifier (URI), but the QRpedia system adds further functionality. It is owned and operated by a subsidiary of Wikimedia UK (WMUK).
QRpedia was conceived by Roger Bamkin, a Wikipedia volunteer, coded by Terence Eden, and unveiled in April 2011. It is currently in use at museums and other institutions in countries including Australia, Bulgaria, the Czech Republic, Estonia, Macedonia, Spain, India, the United Kingdom, Germany and the United States. The project's source code is freely reusable under the MIT License.