This is my qmk userspace, containing the common code and layouts for the keyboards I use or have played with.
From inside this repo,
qmk flash keymaps/whatever.json, should work just fine
for any keyboard in the keymaps directory.
Most recent build job has a zip file that contains CI-built hex files of all the boards.
Everything's available under the MIT license. tl;dr: you can do anything you want with this repo but you must include a copy of the local LICENSE file and I am not responsible for any breakage.