Its really a shame that Google is rapidly becoming so unabashedly evil , because they really do have some smart folks on the team. One of the latest useful applications to come from outside of the world-domination division is Google Tone: Tone can share useful application data using sound; specifically URLs. There are many possible uses for this sort of thing. Advertisers should be more excited about this then they were about those always annoying and once-ubiquitous QR codes. Those interested in human rights work and IT security could I am sure come up with some uses more useful to humanity. Here is a link to a Tone download from the Chrome web store ; Tone is available to start with as a browser extension.