Tongueduino
http://www.theverge.com/2013/2/21/4014472/trick-out-your-tongue-taste-the-world-with-tongueduino
[youtube=https://www.youtube.com/watch?v=zUyoVHjXF3A]
Tongueduino is an interface to the tongue that allows for small electrical impulses to be applied to the tongue as input to a human. Having never tried it, the tongue apparently is highly receptive to input at a fairly high resolution. Higher than the 3×3 interface shown in the video above. While this looks like a novelty, there is research showing this technology as a way to help blind “see”. But I am sure there are some fun uses for this as well.

Papa Sangre
http://www.papasangre.com/
This is an iPhone game from a few years ago that used stereo audio as a replacement for video. Meaning there was no video output to help the user navigate the virtual world. Instead the player had to listen in order to figure out where to go and what to do. This is probably not the first game to do this, but I remember hearing about it a few years ago and thought it was a cool idea that did something unconventional for a game.

Racer
http://www.chrome.com/racer
[youtube=https://www.youtube.com/watch?v=17P67Uz0kcw]
I’m not sure what it is with games for this post, but this is another game from last year. This Chrome Experiment allowed the multiple devices to be used together to create one game board. What is most interesting about this project is that it takes these typically very personal devices, cell phones and tablets, and makes them something that is shared. Typically each user plays from their own device, and usually not is the same physical space as their counterparts, but this game brings back a nostalgia with playing with neighborhood kids when I was younger.