Cambridge University Library

E-scores

Printed scores Online

International Music Scores Library Project
contains more than 70,000 scores

Online music scores
a survey of what is available; produced by Gordon J. Callon's

Free Sheet Music's guide
finding sheet music on the web

DMOZ Open Directory Project: Downloadable Music Sheets
a directory of sheet music sites

Mutopia
general collection of music online

Choral Public Domain Library
Choral music online

Bodleian Library Broadside Ballads
historical ballads

Lester S. Levy collection of sheet music (John Hopkins University)
American popular songs (1760-1960)

Manuscripts and early printed music

RISM - Music Manuscripts after 1600
index of music manuscripts 1600-1800 in libraries all round the world

RISM (UK & Irl)
free online catalogue of 1600-1800 MSS in British & Irish libraries:
includes more items from the UK & Irl than are on the main RISM database.

RISM (Switzerland)
free online catalogue of manuscript and printed music 1600-1950 in Swiss libraries:
includes more items from Switzerland than are on the main RISM database.

RISM (USA)
free online catalogue of manuscript and printed music 1600-ca. 1900 in American libraries (with searchable music incipits):
includes more items from the USA than are on the main RISM database.

Indices and Guides to Music MSS (mostly British) on Microfilm
information about series published by Thomson/Gale (originally Harvester); also includes substantial amount of non-music microfilm series (search for an individual manuscript press mark, or a name of specific series or music collection).

Hofmeister XIX
free online index and facsimiles of Hofmeister Monatsberichte, 1829-1900 (lists of then newly published music)