Firmware in mechanical keyboards. QMK Configurator, QMK Toolbox and QMK CLI (command line interface) are used to program QMK. VIA Configurator software is used to customize QMK keyboards on the fly.

[Oleg] is a software engineer who appreciates a good keyboard, especially since coming over to the dark side of mechanical keebs. It’s true what they say — once you go clack, you never go back. Anyway ...