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Boss OC-3 Super Octave
Boss PS-6 Harmonist
Digitech Whammy DT
Digitech Whammy V
Electro-Harmonix Micro POG
Electro-Harmonix Nano POG
Electro-Harmonix Pitch Fork
Electro-Harmonix POG 2
Eventide PitchFactor
Hotone Octa
Meris Hedra
Mooer Pure Octave
TC Electronic Quintessence
TC Electronic Sub-N-Up
Walrus Luminary