I have a notepad I built in Python that I really like. I keep a running list of notes in it that’s always available by typing “notepad” into the command line.

I have soil moisture sensors for my wife’s plants (and an air quality sensor) that’s generating a constant stream of sensor readings. I wrote my own OTA updating code for that because I was frustrated at having to plug in sensors to update the code.

I have a few calculators too.