Amazon.com: Perixx PERIBOARD-535RD Wired Ergonomic Mechanical Split Keyboard - Low-Profile Red Linear Switches - Programmable Feature with Macro Keys - Compatible with Windows and Mac OS X - US English, Black : Electronics
Aurora Sweep PCB Kit — splitkb.com
The Voyager: A powerful, low-profile, split ergonomic keyboard | zsa.io
splitkb.com - All about split keyboards.
Introducing the Cantor keyboard! A 42 key diodeless split keyboard! As promised, the source is now public. : r/ErgoMechKeyboards