BuuKeeb is a custom mechanical keyboard PCB I made as both a way to learn PCB design, but also because I struggled to find something that fit my very specific niches.
The keyboard features:
105 keys with ISO enter for the 0.01% population of the world who types on a Portuguese layout. Media key support.
QMK support thanks to the STM32F072 microcontroller
Hotswappable MX switches
N-Key Rollover
Per Key LEDs on the north side, individually addressible. OpenRGB support.
LED indicators for Caps Lock, Numlock, and Scroll Lock
Completely open source
I wrote a ginormous blog post about the creation process, which also serves as a sort of tutorial for anyone looking to get into mechanical keyboard design.