Dude Harp
- Custom Hohner harmonicas with stainless steel, wood or plastic combs. Modified for tightness, loudness and comfort.
- http://www.skyenet.net/~optimal/

Antony Dannecker
- Sales of Dannecker and Hohner harmonicas, repair and tuning services.
- http://www.southx.biz/dannecker/home.htm

TablEdit
- Downloadable tablature music notation software for fretted string instruments or harmonica
- http://www.tabledit.com/

Wuxi Suzuki Musical Instrument Co.,Ltd.
- A Sino-Japan JV comprehensive company which has 250 sets of special equipment such as magnetic production capacity in producing 230,000 dozen of harmonica a year.
- http://www.wuxi-suzuki-musical.com/

Richard Sleigh
- Offering customized diatonic harmonicas made by Joe Filisko, Richard Sleigh, and James Gordon, using what is known as the "Filisko Method" of upgrading harmonicas. These harmonicas enjoy a very high reputation.
- http://customharmonicas.com/

Coast to Coast Music
- Free harmonica playing tips, saeles of Lee Oskar, Hohner, Suzuki, Huang, Shaker, Pignose, and many other brand names.
- http://www.coast2coastmusic.com

LaVoie Titanium Harmonica Comb
- Testimonials in support of the titanium harmonica comb from well known harmonica players, Kim Wilson, Jerry Portnoy, and others. Information on the comb and its inventor, Mark LaVoie, as well as pictures of Mark and harmonica great Sonny Terry.
- http://www.middlebury.net/lavoie/

Harp Depot
- Offers harmonicas and other musical instruments at discounted prices.
- http://www.harpdepot.com