The Society for the Preservation and Advancement of the Harmonica
- SPAH offers online guide to harmonica events, noted performers, merchants, manufacturers, and publications.
- http://www.spah.org/

Diatonic Harmonica Tunings for Celtic Music
- Breton harmonica player Jean Sabot offers information on alternte tunings for Celtic harmonica. Site also includes some scores, a discography of his work, and his itnerary.
- http://perso.orange.fr/jsabot/accueilan.htm

Harmonicas on Display at the National Music Museum, Vermillion, SD.
- A list of harmonicas on display, with links to photos.
- http://www.usd.edu/smm/BatesExhibit.html

Overblowing the Diatonic Harmonica
- Based on the techique popularized by Howard Levy. Offers practice routines and harp modifications, and recordings of overblow-heavy harmonica pieces.
- http://www.tenhole.com/

Ron Good's Harphouse
- Harmonica links & lessons and other information from a Canadian multi-style harmonica player from British Columbia. Some info on equipment, amps, mics.
- http://www.rongood.net/harphouse

Frank Bard Harmonica
- My new CD demonstrates the versitility of the diatonic harmonica played crossharp style. It includes easy listening, western swing, bluegrass, blues, standards, gospel, and country music.
- http://www.ctcn.net/~febard

Learn Harmonica
- Learn to play harmonica for free. Free instruction, songs, tabs, tips, sound files, CDs keyed, message board, chat room, and theory.
- http://www.learnharmonica.com/

Harmonica Players on the Web
- A complete listing of many players and featuring pro and amateur players, male and female, diatonic and chromatic, and all styles of music.
- http://harmonicaplayers.com

Suzuki Musical Instruments
- Pictures, descriptions, and ordering information for harmonicas.
- http://www.suzukimusic.co.uk/

Bluesharp.org
- A single page which organizes many of the harp resources on the Internet.
- http://www.bluesharp.org

CrossHarp.com
- Contains harmonica-related links and streaming Real Audio.
- http://www.crossharp.com