Eric S Raymond and keyboardio
Eric S Raymond (aka esr) is a well-known early hacker, of unix generation, about same age as Richard Stallman. ESR is author of few unix software and books. A major figure in the open source scene about 1997 to 2005. And controversial for his gun advocacy and others.
esr is also a big fan of mechanical keyboards, in particular, the IBM Model M with its buckling spring key switch. 〔►see IBM Model M keyboard, Unicomp 〕
(by the way, I, Xah Lee, don't like many of esr's ideas and views, but he is very capable and knowledgeable man, broadly.)
keyboardio is a new generation of keyboard design, by Jesse Vincent, also a old school hacker, perl expert and book author. 〔Jesse Vincent on twitter at https://twitter.com/obra〕
here's my keyboardio review: Keyboardio Keyboard Review
or, buy something from Best Keyboard for Emacs