22 Key half-split keyboard
I currently run ZMK on this board. My config and layout can be found here.
A version 2 of the HS22K may or may not happen. I have, however, designed and built a 22 key split keyboard similar to this and it is available here.
I recently participated in the swedish programming podcast Kodsnack where I and Fredrik Björeman discussed my keyboard journey, the episode is in swedish and can be found here.