http://homepage.ntlworld.com/alan.turnbull Free loan of vintage, out of print sheet music from this non-profit service. http://www.pucpr.edu/diocesis/14cantoral.html Catholic liturgical music in PDF and MIDI format. http://www.gmd.de/Misc/Music/scores/Welcome.html Classical sheet music in MusiXTeX, PDF and PS formats. http://www.cs.ius.indiana.edu/AK/KSANDER/web_docs/DownloadPage.html Orthodox choral music, free for liturgical use only. http://www.mutopiaproject.org/ Open-source sheet music in PDF, PS, and GNU LilyPond formats. Mostly classical, with a little jazz. http://www.soundpost.org/petrucci.html A project to digitize public domain sheet music. Some scores are available. http://www.trachtman.org/ragtime/musicbooks.htm A source for ragtime music. Includes some downloadable tunes in GIF format. http://www.sheetmusicarchive.net Large selection of public domain classical sheet music, including the great works of famous composers. http://www.chopinfiles.com Chopin Nocturnes, Etudes, Waltzes, and Preludes in PDF, MIDI, and realAudio http://www.cpdl.org/ An extensive archive of choral music in the public domain. http://icking-music-archive.sunsite.dk/ A continuation of the now defunct GMD Music Archive.