Where can I get the apps demoed in this video? - http://www.youtube.com/watch?v=_UHihaQOB3g
These apps were used to demo Leap Motion in most of the videos before its release, but I can't find them in AirSpace.
AlanDavis posted wrote up a good explanation of MT4j fluids.
You may be able to follow his instructions to do the same with the MT4j Modest Maps demo.