Does anybody know of any tridimensional chess programs? Multiplayer would be great too. I tried Googling, but all I could find were hundreds of traditional chess games that are called "3D" only because the rendering of the board and pieces are 3D -- not because the game itself was different. I did see a few physical sets on Amazon from the Franklin Mint for a ridiculous price, but I don't know anybody who'd actually play it with me in real life. Anyway, thanks for your responses!
On Android phones, there is an app called "Tri D Chess". Can be downloaded from Google Play. Never played it though.