This has been around for over 4 years but I haven’t seen it before (and I used to read slashdot back then.) 3D renderings of function/variable dependencies in the Linux kernel. The neat stuff are the mpegs of the evolution of the kernel over time – you can actually see bloat happening. Too bad he hasn’t updated it for 2.6.anything, but since it falls into the category of “useless but pretty”, I’m not surprised.