Its an old video, but looks like an interesting editor.
http://www.youtube.com/watch?v=gWYUm7sk6NM
Anyone knows what he is using?
The title bar says, NetCrystals 1.0, but a quick google search and found nothing like that.
Its NetBeans, just like the SDK. The guy is @Equilibrium and doesn’t want to do anything for the engine. The software he does is for visualizing molecules.