- The Aria Database information on opera arias
- The Classical Music Navigator information on classical music composers and their works
- IMSLP International Music Score Library free sheet music in the public domain, “a music library to provide music scores free of charge to anyone with internet access”
- Kirk Collection: Popular Song Index a catalog of digitized sheet music for popular songs from 1865-1968–from the Cunningham Memorial Library at Indiana State University
- Lyrics World extensive database of song lyrics
- National Jukebox historical recordings from the Library of Congress
- Second Hand Songs extensive database of songs–find out who did the original version or who redid a song
- The San Fransisco Symphony Watch, Listen & Learn an interactive guide composers and symphonies