MessLess was my team's project at the most recent PennApps Hackathon (a 48 hour app programming contest). The apps were judged via video submission this year - ours is below!
(That's me in the video, though I hadn't slept in two days when this was recorded. Also I'm wearing pajamas.)
I was responsible for the Leap Motion integration and a large portion of the design/styling. It was a fun interaction design challenge, and we ended up with a pretty cool app. Sadly it didn't win, but we'll be back for the next one.