I have the Dano French toast and a Fulltone Ultimate Octave. The UO is bulit much better and has more versatility, but the FT does a surprisingly good job, for very low $$. I find that neither is a pedal I'm going to use very often so I'm planning on selling the UO to a friend and keeping the FT for when I feel like doing the Jimi thing.
I also have a Guyatone Tz-2 fuzz. It has just a touch of the upper octave present in its tone, not nearly as present as a true octavia type pedal.