Japanese Spanking Simulator
Japanese Spanking Simulator, submitted by professor nibbles. I have no idea what this website actually says, but who cares about the text when there's a giant 3D butt you can spank?!
It's kind of rudimentary. The butt doesn't even move or jiggle in the slightest, but to be fair, it is an early version. Other features include gradual butt redness, what I assume to be a slap strength selector along the right side, and an "auto" button -- you know, for hands-free operation. How thoughtful!