A little tool that prints out random chords at a given tempo, which I've been using to practice jazz chords/keeping up with a chord chart. It has options to configure tempo, time-signature, and more.
The set of possible chord qualities/aliases for those chord qualities is definitely not exhaustive. If there's one you'd like me to add, open an issue (or a PR). I probably won't add slash-chords, since they require more theory to generate.
# to run:
npm start
Click sound effect is adapted from this Metronome sound effect by Mike Koenig, which is under an Attribution 3.0 license: https://soundbible.com/914-Metronome.html