Homespun Tapes  
   Wide selection of videos, CDs and audio cassettes for all instruments and styles.
   https://www.homespuntapes.com/

Mike Mangini's Rhythm Knowledge Online  
   It offers rhythm instruction materials for all instruments.
   http://www.rhythmknowledge.com/

Dr Downing Music  
   Troubleshooting books for all musicians.
   http://www.drdowningmusic.com

ADG Productions  
   Books, CDs, videos and software for most instruments and styles.
   http://www.adgproductions.com/

Southern Music Company  
   Sheet music and methods for all instruments and ensembles.
   http://www.southernmusic.com/

The Penoka Collection  
   Books and videos for all instruments.
   http://www.penoka.com/d_teach.htm

Ear Training  
   Description of the Perfect Pitch SuperCourse package, verified by research at 2 leading universities.
   http://www.eartraining.com/

Musician's Workshop  
   Video and audio products for string and keyboard instruments, harmonica, and tinwhistle.
   http://www.musicians-workshop.com/

Berklee Press  
   Books and recordings covering all instruments and all main music topics.
   http://www.berkleepress.com/

Edly's Musical EdVentures  
   Sells two books: one for to learn music theory and one for piano.
   http://www.edly.com/

Music Minus One  
   Participatory recordings and accompaniment music for musicians and vocalists, including all styles.
   http://www.musicminusone.com/

MusickEd.com  
   Study guides and learning tools for all instruments. Also online lessons.
   http://musicked.com/

Jam Track  
   Jam tapes and CDs for guitar, piano, keyboard or solo musical instruments.
   http://www.jamtrack.com/

Cassette and Video Learning Systems  
   Instructional books, DVDs and video for guitar, bass, keyboards, drums, harmonica, banjo mandolin, violin and fiddle.
   http://www.cvls.com/

Music in Motion  
   Sells books, videos, audios, awards, teaching aids, posters, gifts and software.
   http://www.musicmotion.com/

Comprehensive Ear Training  
   A progressively graded series of books, CDs, cassettes, and MIDI discs.
   http://www.keystrokepublishing.com/

Healing Music  
   Books, CDs and tapes for to practice singing and songwriting.
   http://www.healingmusic.net/

Jane Peterer Music Corporation  
   Online store of songbooks, method books, and sheet music in general.
   http://www.jpmc.com/Merchant/merchant.mv?Screen=SFNT&Store_Code=books

Learn About Music  
   Sells books and CDs for all instruments and music levels.
   http://www.learnaboutmusic.com/

Allstate Sight Reading  
   Books for all instruments and choral students.
   http://home.att.net/~l.mclure/

Flying Leap Music  
   Publishers of You've Got Rhythm, a method to learn and improve music-reading skills.
   http://www.fleap.com/

Creative Horizons Music  
   Sells biblical psalms sheet music, a chord scale chart, and a handbook explaining music theory.
   http://www.creativehorizonsmusic.com/

Just Duet!  
   They transcribe your keyboard accompaniment or instrumental sheet music into MIDI files.
   http://www.justduetonline.com/

Easy Music Books  
   Offers songbooks and instructional books, CDs, tapes and videos, for various instruments and styles.
   http://www.easymusicbooks.com/

Allegro Music Online  
   Complete line of products including popular piano methods and Suzuki materials.
   http://www.allegromusiconline.com/

Pro Audio Music  
   Wide selection of books, videos, CDs and software for all instruments and music topics.
   http://proaudiomusic.com/educational.htm

MVP: Music  
   Offers an extensive collection of instructional videos.
   http://www.mvphomevideo.com/

One Day at a Time  
   Offers a selection of musical instructional products for all instruments and styles.
   http://www.1dayx.com/

Music Message International  
   Offering instructional videos for several instruments.
   http://www.musicmessage.com/

Crystal Publishers  
   They offer over 25 books for beginner and advanced players.
   http://www.crystalpub.com/

ModRock.com  
   Guitar tabs, books, videos, sheet music, and CDs for all instruments.
   http://www.modrock.com/

Musicridge  
   Offers instructional videos for accordion, stringed instruments, drums, and brass ensembles.
   http://www.musicridge.com/

Ron Greene's Music Dials  
   Visual reference guides that show the chords and scales you can play with all instruments.
   http://www.musicdials.com/

Musicroom.com  
   Music tuition and music-related books for all instruments.
   http://www.musicroom.com/mfschools.ihtml

Letsplaymusic.com  
   Offering several educational books for accordion, harmonica, and guitar.
   http://www.letsplaymusic.com/