I'm really into synthesizers with one page interfaces these days. I've been working a lot with Rob Papen's Predator which has a fantastic UI. Almost all control "sections" are displayed on one page. I say almost as they couldn't quite cram all the control elements in.
To accommodate more controls without cluttering up the interface, there are toggle buttons on the interface. Use the graphic above as a guide to access additional sections, see the back of the synth, and access the help file.
More on Predator in future posts...