You know there's something wrong with the state of software when the first recommendation on my curated list of programs is to use pen and paper instead.
https://cosine.blue/recommended.html
So far I've discussed sensible password managers and web browsers. All free/libre. All good stuff (except maybe Firefox which everyone hates now).
Vanilla Firefox Keyboard Mastery - No mouse. No add-on. No problem. https://cosine.blue/2020-12-06-firefox-keyboard.html