The Dactyl keyboard is made by Matt Adereth, around 2014-04.
Total key count: 70.
Typing on the Dactyl Keyboard
Dactyl keyboard is the best
The best keyboard, that i've ever put my hands on, is now, Dactyl keyboard.
[see San Francisco Bay Area Keyboard Meetup 2017-11 Impressions]
It's super light and elegant! and, is the most comfortable of all, more comfortable than Kinesis Advantage.
3D Modeling, Keyboard Design, Clojure, and Emacs
truely enjoyed this video. You see 3D modeling software, 3D printing, keyboard design/making, using clojure to control, and finally, emacs too!
see his blog at [3D Printing With Clojure By Matt Adereth. At http://adereth.github.io/blog/2014/04/09/3d-printing-with-clojure/ , accessed on 2015-11-16 ]
many build comes up regularly. Search reddit.
Where to Buy
build instructions https://github.com/adereth/dactyl-keyboard
prebuild for sale https://ohkeycaps.com/products/built-to-order-dactyl-manuform-keyboard
Concave Surface Keyboards
If you have a question, put $5 at patreon and message me.