PAiA Vocoder
- Inexpensive rack mount kit designed by Craig Anderton.
- http://www.paia.com/vocoder.asp

Vocoders and Vocoder-Derivatives
- Detailed description of how vocoders work as well as ways of improving results.
- http://lonestar.texas.net/~mr88cet/VocodingWebDemo/VocoderDemo.html

Korg MicroKorg
- Synthesizer with integrated 8-band vocoder and microphone.
- http://www.korg.com/gear/info.asp?A_PROD_NO=microKORG

Electrix WarpFactory
- MIDI controlled hardware device, several audio demos available.
- http://www.electrixpro.com/products/warpfactory.html

Doepfer A-129
- Modular 13-band vocoder designed for the A100 modular synthesis system.
- http://www.doepfer.de/a129e.htm

Analog Vocoder information
- Specifications and reviews of vintage hardware vocoders.
- http://web.inter.nl.net/hcc/davies/vocpage.htm