First, why doesn't anybody make a general patch editor and librarian app for synthesizers any more? Unisyn was great, and Sound Diver wasn't bad. Can't some developer come up with a framework for people to develop and share their own patch editor interfaces? They wouldn't even have to individually support each synth... users would do that, using the framework, and could freely share the profiles.
Regarding patch editor/ librarians I think Midiquest is still available, for Mac and PC