University of Florida
Baldwin Library: The Baby's Opera by Walter Crane
This is an online photocopy of the original text of the children's book The Baby's Opera by Walter Crane (1890), a collection of children's songs with music and lyrics.
Other
The Aria Database
The searchable Aria Database features over 1,200 arias from 170 operas by 60 composers. It includes lyrics, translations, synopses of operas, and MIDI files.