Song Indexes
The following are song indexes maintained by other libraries that point to their own songbook collections, which may be useful for tracking down song titles:
- Popular Song Database - University of Washington
- Sheet Music Index - Santa Cruz Public Library
- Song Index - Los Angeles Public Library http://www.lapl.org/collections-resources/lapl-indexes/song-index
- UT Song Index - University of Tennessee at Knoxville
Digitized Collections
Scanned (or digitized) images of songs that don't violate copyright restrictions, i.e., songs in the public domain (usually published in 1923 or earlier):
- 19th-Century California Sheet Music - from the collections of public and private libraries and museums, primarily in California, including San Francisco Public Library
- Charles H. Templeton Sheet Music Collection - a collection of ragtime, blues, minstrel, and old-time popular sheet music from Mississippi State University
- Choral Public Domain Library - notated music and MIDI renditions of choral music
- International Music Score Library Project (IMSLP) - a wiki with scanned music scores in the public domain
- Music for the Nation: American Sheet Music 1820-1860 and 1870-1885 - Library of Congress
- Sheet Music Consortium - a cooperative project of UCLA, Indiana University, John Hopkins University and Duke University
- Variations - classical music, including opera, art song, orchestral, chamber and piano music, from Indiana University