We frequently report on nano-scale robots being developed for medical purposes. If you've ever wondered what medical nanobots would look like, Robert A. Freitas Jr. can show you. His Nanomedicine Art Gallery has an artist's conception of nearly every type of nanoscopic robot and device proposed, including DNA repair robots, utility foglets, artery cleaners, dental nanorobots, even hairjacks (think lumberjacks). Weird and wonderful stuff.