When we reviewed the Leap Motion controller earlier this year, we found the application selection to be a bit lacking. Since then, the number of apps has doubled from 75 to around 150, and the Airspace store's newest edition is the coolest Leap app we've yet seen. It's called Free Form, and it's a 3D sculpting app built in house at Leap Motion that lets you manipulate and shape digital objects using your fingertips. David Holz, company co-founder and t