Quite a few jazz tunes have chords here: http://songtrellis.com/changesPage http://songtrellis.com/changesPage Some of the chord charts are machine readable (a

Quite a few jazz tunes have chords here: http://songtrellis.com/changesPage http://songtrellis.com/changesPage Some of the chord charts are machine readable (available as just plain text), while others are images, but looks like all/almost all of them are available as MIDI as well.