The Borg Cube
Sorry, as a Star Trek (TNG) fan, this one couldn't be avoided. The Bog Cube mod appeared back in 2004 and can be found here. "I first intended to use a small midi case (A-Open H340B) with a Via EPIA-M 933 MHz chipset and 256MB RAM memory," said Dutch modder Xor'Arch over at CaseJunkies. "After having put it all together, I was not really satisfied with the way it looked. It looked kind of boring to me and that's when I got the idea to build a case myself." Apparently, the assembly stretched across nine months and encompassed around 250 hours total.