2 layers239.6 × 114.8 mmKoepckeaessbb/koepckeae34 key unibody split with splay and spaced out thumbs49 parts14MIT
4 layers225.7 × 88.2 mmPiprassbb/pipra30-key low profile electro-capacitive wireless split keyboard.202 parts10CERN-OHL-W-2.0