Atom in a Box

Excellent visualization.

I have no understanding of Hydrogenic Atomic Orbitals, but this amazing 3D visualization-simulation program is fascinating and I never tire from watching it's hypnotic appeal.

If you've ever used the Mac version of Atom in a Box you know what to expect -- you can choose the (hydrogen) orbital you want (2p, 3d, whatever..) and then you get a very nice 3D model that shows phase information. You can spin it around with your finger, you get a set of axes, all the appropriate equations at the bottom including the numerical value for the energy of the orbital (along with the equation that calculated), and a graph of the radial distribution function! Only downside is that there's no explanation for what the extra settings do, that I could find anyway.