Here's an excellent free Max4Live device offered by youtuber Wireframe Wolves. Chordscout is a MIDI device for discovering chord progressions - offering them up with a chance to look back through chord history. The device contains a table of chords to select from and each time a chord is selected, the table is repopulated with suggested chords.
The table is sorted so that the most similar chords are in the first column, the next most similar are in the second, etc. and the chords can be grouped by root note so that they're easier to find. Absolute genius!
Get the device here: https://gum.co/chordscout
Desktop polyphonic MIDI and CV/Gate
Artist, Producer, Remixer and Performer
Deep look at the new generation interface