We posted about this a while ago, but now theres an online java applet version, so lets link to that here.

tree is a translation program. the simulation of real space by software as a starting point and basic question characterizes the search for an algorithm (design specification) which illustrates a real tree. tree interprets each html page as a design specification; the html space determines the algorithm and generates the visual world of the translation beyond simulation.

I want to be able to rotate and zoom in.