Musica Viva:A center for free sheet music (classical and traditional). 600+ titles in gif format, about 200 titles in ABC format, as well as The Free Sheet Music Directory, listing more than 300 other sites.
ABC Collections: Links to pages with music downloads in the abc format, mostly folk and celtic.
Easy Sheet Music - Free Sheet Music Links: Listings of sites offering sheet music for free. Includes sections on classical sheet music, popular, piano and guitar music.
Ed's Music Resources: Extensive collection of links to free sheetmusic sites and music resources, including latin and salsa music.
fac-simile.org: Directory of listings for free online music scores.
Festival Singers - Choral Sheet Music Download Sites: Large collection of links to choral music publishers who have complete or sample scores available for downloading.
Find Free Sheet Music: Well organised collection of links categorized by musical style and instrument.
FreeSheetMusicGuide, The: Popular music, Classical, Christmas and other links to free sites. Some commercial listings.
Meantone.com: Free Classical and Parlor Guitar Sheet Music in downloadable pdf format.
Mundial Directory: Large array of links to free scores for winds, strings, keyboards, choral, orchestra and percussion. Includes links to MP3s.
Online Music Scores: Links to scores which may be downloaded free of charge, collected by Howard J. Callon, music professor at McGill University in Seattle, Washington.
Sheet Music Web: Large collection of links to sheet music web sites.