3D Printable Dactyl Ergonomic Keyboard

Matt Adareth developed and released his "Dactyl" ergonomic keyboard under CC license. This open source keyboard is described as “parameterized, split-hand, concave, columnar, ergonomic keyboard.”
As you can see it was 3d printed on a SLS machine but it could be probably made using other machines with some adjustments.

You can see a very interesting presentation by Matt about keyboard design and 3d printing at:

https://www.youtube.com/watch?v=uk3A41U0iO4 (video is not embedable). It is also great to watch if you are into more advanced OpenSCAD environment development.

All the files for it can be found here:

https://github.com/adereth/dactyl-keyboard

Here is a Reddit thread about it:

https://www.reddit.com/r/MechanicalKeyboards/comments/3vf29t/open_source_release_of_dactyl_keyboard_code/