Patti Music Company  
   Classical piano & organ music: online catalog
   http://www.pattimusic.com

Easy Staff Music  
   Offers a book with classical compositions converted to a new music notation system. Description, samples, and order form are included.
   http://easystaffmusic.com/

Amy R. Laurence Music  
   Original literature and arrangements; composition contest; self-publishing advice.
   http://www.amyrlaurence.com/

Michael's Pianos  
   Large selection of music and books for all performers, students and teachers, of all ages.
   http://michaelspianos.com/

MusicForAccordion.com  
   Offering titles for Accordion in both digital and sheet music format.
   http://www.musicforaccordion.com/

Classic Rock Sheet Music  
   Sheet music of popular songs in a piano-only format that aids the analysis of song structure and design.
   http://www.classicrocksheetmusic.com

O'Lyn Callahan  
   Organ registrations and music for the Technics and Yamaha organs available on a floppy disk.
   http://www.olyncallahan.com/