MetaNecklace 

This necklace will light up whenever you tweet at it.

Watch the TED talk here: http://www.ted.com/watch/ted-institute/ted-ibm/lisa-seacat-deluca-a-young-inventor-s-vision-of-the-future

This is an example Apache Cordova project that allows a user to connect to their Metawear device over bluetooth low energy (make sure your phone has bluetooth low energy capability!) and control the board.

Available for download from: https://github.com/ldeluca/metawear

Get the background story here: http://asmarterplanet.com/blog/2014/09/mobile-cloud-software-development-will-outfit-wearable-era.html

The github repo for the Cordova / PhoneGap plugin for MetaWear: