The much more obvious alternative is VCV Rack, with 2400+ modules, GPL'ed, totally cross platform and in most ways incredibly awesome.

Ok, so that is really more awesome then AMS? I can't imagine. :)

It doesn't have zita plugins, are you sure it sounds as good?

I launched it last week indeed, but got crackled sound after 10 minuts, so I gave up then. Not bad to start simple with AMS anyway.

Will checkout VCV Rack. Thanks for the suggestion.

(But even if VCV Rack will suits my needs better, it's nice to have AMS working fine as LAU/LAD-community.)