Two years ago, inventor Pranav Mistry demoed the SixthSense technology on the TED stage — and talked about open-sourcing the software behind it. SixthSense is a wearable interface that enables interaction between digital information and the physical world through hand gestures. (Watch his TEDTalk to see how it works.)

As promised, Pranav and his team have open-sourced the code for anyone to use and contribute at www.code.google.com/p/sixthsense. Download the code and create your own SixthSense device, join a discussion group and augment the codebase.