Digital sheet music
General
Petrucci-library
A large digital notes-archive. Contains more than 50.000 classical titles (chamber music, symphonic works, complete operas). You can browse on composer name, composer period and work genre. The archive also contains scores from composers who are willing to share their music with the world without charge
Boris Tarakanov
The digital notes-archive of Boris Tarakanov. Website in Cyrillic.
Sibelius Music
Large database with digital scores (classical music, jazz, pop and rock)
Choral Public Domain Library
An archive with almost 9000 compositions for choir, with translations of the texts and information about the composers
Repertoire Vrouwenkoor
A digital notes-archive with music for women's choir a capella
Theaterlied
11588 Dutch songs from the collections of the Theater Instituut Nederland. Digitalized for the project Het Geheugen van Nederland.
Wikifonia
A digital notes-archive mainly for popular music and jazz (melody line, chords and lyrics)
Composers
Johann Sebastian BACH
Bach Digital (contains digital reproductions of the music manuscripts)
Ludwig van BEETHOVEN
Beethoven-Haus Bonn: digital archives (contains digital reproductions of the music manuscripts)
Johannes BRAHMS
Digitaler Notenschrank (scanned old editions of all opuses)
Alphons DIEPENBROCK
Manuscripts of Alphons Diepenbrock (all Diepenbrock-autographs from the collections of the Nederlands Muziek Instituut, digitalized for the project Het Geheugen van Nederland)
George Frideric HANDEL
Handel Werke (the digitized version of the series that was published by the Deutsche Handel-Gesellschaft between 1858 and 1902, ca. 100 volumes)
Franz LISZT
Franz Liszts musikalische Werke (the digitized version of the series that was published by the Franz Liszt Society between 1907 and 1936. The 34 volumes contain the main part of Liszts oeuvre)
Felix MENDELSSOHN-BARTHOLDY
Mendelssohns Werke (the digitized version of the series that was published by Julius Rietz between 1874 and 1877 (editor: Breitkopf & Härtel)
Wolfgang Amadeus MOZART
NMA Online (the digitized version of the Neue Mozart-Ausgabe, ca. 125 volumes)
Mozart's letters (this site provides a complete, four-language, annotated searchable edition of Mozarts’ letters)
Franz SCHUBERT
Schubert-Autographe (digital reproductions of more than 500 compositions and letters in autograph)
Robert SCHUMANN
Robert Schumann's Werke (the digitized version of the series that was published by Clara Schumann and Johannes Brahms between 1879 and 1893 (editor: Breitkopf & Härtel)