Here’s some fascinating proto-CNC cutting from the 1800s. The parser (or passer) drill was a bow-type drill, held against your belly, that used a template to cut out any shape of hole in wood (for things like inlay work).
In this Pask Makes video, he forges his own parser drill and tests it out on several template designs.
I especially appreciate that he uses simple tools (blow torch, belt sander, anvil) to fashion the drill. And the resulting bit, which can be chucked into any electric drill, works beautifully.