I’ll start.
Works with Kairatune. http://futucraft.com/kairatune/
Simple but excellent sounding, free synth. Good for EDM, techno, dnb. I like it
and Cantabile works well with it, plenty of randomization. I went low around 5%, and it
seemed to give me variations close to the preset that sounded nice.
I’m not affiliated with Futucraft.
Works with Kairatune. http://futucraft.com/kairatune/