JSynthLib is a "universal" synthesizer librarian and patch editor which supports several synths.
Librarian and Editor support has been added for Korg X3, Midibox SID, Yamaha DX7-II, Yamaha TX802, Yamaha FSR1, and Roland TD6. Librarian-only support has been added for Access Virus, Ensoniq VFX, and NordLead. Librarian and Partial Editor support has been added for Yamaha Motif. Support for "Scenes" and bugfixes have been added.
URL: JSynthLib Home Page