The Aria Database is actually three databases in one, linking from its home page to the Ensemble Database and the Opera Role Database. Altogether, the three contain full text of hundreds of arias, operas, translations, and composer bios, as well as links to over 300 MIDI files. The Aria Database contains the complete operatic aria collections of Mozart, Verdi, Berlioz, Wagner, and Puccini and partial collections of more than 50 additional composers. Links to sites where full scores and recordings can be purchased. Especially useful to students of voice and their teachers or any music student seeking information about a specific opera.
Link to resource: Aria Database
Fulltext available: Books