Lasersaur – open-source laser cutter
"Do not stare into laser beam with remaining eyeball."Seriously, this sort of project is dangerous. While there's a big fat disclaimer and warning on their home page, the wiki info about exhaust filtration is sketchy at best, and there doesn't seem to be any sort of serious attempt at health and safety guidelines.Remember: any laser cutter that can actually cut wood can actually cut skin and muscle, cause serious burns, boil your eye in your skull, and creates toxic particulate exhaust.