The Sound Board

I don't have this installed yet, but it has a good reputation.

https://www.uaudio.com/products/polymax-synth

One of my favourite soft synths.
But it has to be added: when it comes to (soft-)synths, I'm a pathetically simple and terribly old-fashioned individual.

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Was just about to write about this one. A real gem!

Started as an electronics experiment if I remember correctly.