I don’t know about you, but I’m super excited to have the latest Zynaddsubfx running in Ardour. I actually got it from the github page for Linux and it took forever to build. I had tried to install it multiple other ways, but it had unmet dependencies or wouldn’t show up in Ardour.
I have come to love the different synths provided in Synaddsubfx because I used to use it in LMMS and it has especially nice choir sounds. It now has a bunch of new synth plugins, and plenty of options for customization.