I absolutely love the way any of my gated fuzzes sound before my Octamizer.
It just turns it into such a deep heavy thick sound. My favorites are the Dr. Scientist Frazz Dazzler, Devi Ever Bit, and my Wooly Mammoth clone.
Huge sounds.
Here is a sample of the way my Frazz Dazzler sounds before my octave pedal.
The Show by Hector G! on SoundCloud - Create, record and share your sounds for free
At 1:28 you can hear the fuzz without the octave and notice what a difference there is.