Shine, by Misfit Wearables, is a wearable device that is used to track a wide range of activity. It is roughly the size of 2 or 3 stacked quarters, and uses a proprietary technique of data transfer that doesn’t require cables, charging stations, WiFi, or Bluetooth. The device displays via a series of lighted dots to indicate the completion level.
E-traces by lesia trubat are ballet shoes that digitally record the movements of dancers and present the data as a kind of "drawing on the floor" image. It would be cool to build a corollary robot that could repeat the dance from the data.