An amazing plugin! And it's free! It generates chords and so much more, great for trying out chord progressions. Especially useful for musicians who aren't necessarily good at playing chords on the keyboard.
Note to the developer: As mentioned in my review for moocher's other fabulous plugin 'Hypercyclic', please port this wonderful plugin over as a MIDI FX insert in Logic X, that would be killer.
Agreed that tonespace deserves to be reviewed carefully. There's a lot of plugins out there for diverse audio effects. But not that many for MIDI effects and especially not that many no-cost ones.
From experiments with tonespace, now trying to do some similar things with my own Pure Data patches. Turns out, it's actually easier than expected, especially with help from the PdPatchRepo forum. Nice thing with that option is that it should work on a Raspberry Pi, including audio output.