CPDL.org is a portal for free sheet music, scores, composer info & more
Begun in December 1998, CPDL is one of the world's largest free sheet music sites. All its scores are in the public domain and can be freely downloaded. Most of these are public domain editions of music whose copyright has elapsed, but some scores are newly composed and offered for download by the composer.
As well as scores, you can use CPDL to find texts and lyrics, translations, and information about composers -- all in the public domain and free to use.
English; Main Page and some other pages translated into Dutch, French, German, Italian, Portuguese, Spanish, Vietnamese.