Resources for String Players
General
Guild of American Luthiers
Rolin Music, a directory of string instrument accessories. Searchable.
American String Teacher's Association
Catgut Acoustical Society
American Society of Ancient Instruments
Violin
Violin Making
International Violin Competition of Indianapolis
Do you have a Stradivarius label? If you've found one in your violin go look at this site!
International Violinmakers school of Cremona
The Violin Society of America
Viola
American Viola Society
Viola Society Website lists many more viola-related sites
Cello
Internet Cello Society
UNC Greensboro Cello Collection includes scanned scores held in UNCG's Special Collections.
Bass
International Society of Bassists
Contrabass.com
Guitar
Classical Guitar Home Page (includes Flamenco Guitar as well)
Stropes.com - Finger-Style Guitar Music Publishing & Education
Home page for Luthiers or guitar builders
Stewart-MacDonald: Everything for building and repairing stringed instruments!
Guitar Foundation of America
Harpguitars.net Home Page
Jazz Guitar ONLINE
UWM Music Library's String Pedagogy web resources
http://www.uwm.edu/~rlittman/stringped.html