Electro-Harmonix Octavix Fuzz / Octave Up Pedal | Reverb
Guitar Pedal X - GPX Blog - Mojo Hand FX's Octaverse is a really cool and elegant Reverse Octave Up / Down Delay
Skreddy Pedals - Cephalopod Octave-Up Germanium Fuzz - B-STOCK | Mass Street Music
Amazon.com: TC Electronic SUB 'N' UP MINI OCTAVER Compact Version of Hugely Popular Sub 'N' Up Octaver with Advanced Polyponic Octave Engine and TonePrint-Enabled Technology for Easy Custom Effects : Musical Instruments