Keymap examples - danielschranz/qmk_firmware GitHub Wiki
Share your keymap idea here!
https://github.com/tmk/tmk_keyboard/issues/265
Reverse-shifted for numbers
With pressing Shift and '1' key you get 1 while with just '1' key you get !.
KBT Pure layout
Keymap code on Alps64 https://github.com/thisisshi/tmk_keyboard/blob/15fe63e8d181a8a95988dcc71929f0024df55caa/keyboard/alps64/keymap_pure.c