From my bookmark list. Some may be well-known, some not. Thought I'd share.
The Mutopia Project
Free classical scores
The Sheet Music World Center
IMSLP / Petrucci Music Library
Werner Icking Music Archive
Music Files - Classical sheet music
Klezmixx - some Klezmer arrangements
CPDL - Choral Public Domain Library
The Mutopia Project
Free classical scores
The Sheet Music World Center
IMSLP / Petrucci Music Library
Werner Icking Music Archive
Music Files - Classical sheet music
Klezmixx - some Klezmer arrangements
CPDL - Choral Public Domain Library