Corda Music Publications: specialists in Guitar Solos and Ensembles, String Music and Early Music Editions - 280 editions published
Editions Orphée: Publishing company established in 1978 by Matanya Ophee; online catalogue.
Mollberg Music Media: Downloadable guitar music with tabs, guitar chords, publications, and art gallery.
Tafs Music: Stephen Tafra's transcriptions & arrangements of classical music for sale (with descriptions/comments on each and midi/real audio samples), some free downloads - + links page
Tuscany Publications: Catalog of music for solo guitar, duos and ensembles, and duets with other instruments.