Firmware for Atmega32U4
TMK
- Github repository
- Main support page: https://geekhack.org/index.php?topic=41989.0
- Teensy LC/3.0/3.2
QMK
- Github repository
- Main support page: https://www.reddit.com/r/olkb/
EasyAVR
- Github repository
- Main support page: https://deskthority.net/wiki/Easy_AVR_USB_Keyboard_Firmware
