EurKEY — The European Keyboard Layout

Vertical-Align: All You Need To Know

semaphore — A full-body keyboard

fluxkeyboard.com — A Full HD IPS display allows customisation of the keyboard with any background image, video, or an interactive style. It can automatically switch between profiles to reveal the most relevant keyboard shortcuts and fully customisable macros for any software, or switch to any language.

NuPhy and Keychron — mechanical keyboards

An essential guide to different Mechanical (keyboard) Switches and how they work

ergodox; a next-generation ergonomic keyboard