There are 3 repositories under hhkb topic.
bluetooth hhkb with arduino, Usb_Host_Shield_2.0 and XM-04-HID-K
A Stacked Acrylic Case for original Happy Hacking Keyboard layout compatible with standard 60% PCBs
Teensy 2 controller board replacement for HHKB Lite 2
Mechanical Keyboard Related Resources
HHKB Resources - For dapboot, see https://github.com/Duncaen/dapboot/tree/hhkb (Credit to Hasu and Duncaen for putting most of the work together for this)
A cmd-eikana like Hammerspoon spoon plugin.
My QMK configuration for HHKB2 keyboard + flashing memo
qmk config files for my mechanical keyboard
A Stacked Acrylic Case laser cut for custom Happy Hacking Keyboard
a collection of keyboard resources I made
⌨️ .ahk script to add missing keys for using a nordic layout with the Happy Hacking Keyboard Pro 2.
Magnet-held M0110-style case for a Unix60
Small script that has dfu-programmer packaged with it, allows you to reflash your keyboard without needing to use another keyboard to type in the command line. Gives you a 15 sec pause to put your keyboard into flash/reset/boot mode.
TMK build for Input Club Infinity 60% keyboard
Build Infinity 60% Keyboard using QMK