Opernführer / Opera Guide
- A collection of opera libretti (originals and translations), with links to similar sites. [German/English]
- http://www.opera-guide.ch/

Karada Classical Music: Opera's Librettos
- Biographies of composers and lists of their works. Includes libretti for the works of some of them.
- http://www.karadar.it/Operas/

OperaGlass: Operas
- Extensive directory by opera of libretti, synopses, performance history, background and discography.
- http://opera.stanford.edu/operas.html

English Opera Translations
- English performing translations (librettos) of popular operas, including Marriage of Figaro, La Boheme, Gianni Schicchi, Pagliacci, translated by Ken Jakobs.
- http://www.englishoperatranslations.com

Libretto Homepage
- Public domain opera libretti and other vocal texts.
- http://opera.stanford.edu/iu/librettim.html