Been working on https://handy.computer. It's similar to SuperWhisper and others, but is open source and cross platform

It uses whisper.cpp under the hood and should be accelerated on most devices using the Vulkan backend

thanks for making this! I'd love to use the microphone key (fn + mic) to trigger Handy but even after turning off dictation it doesn't seem like the system allows that key to be used (I get a dialog prompting me to turn on dictation).