A search for "libretto" at the online section of the French National Library.
The Christian Her libretto collection at Münchener Digitalisierungs Zentrum contains around 5,700 libretti.
Approximately 60 links, mostly greatest hits.
Approximately 100 links, most with Spanish-language translations.
Approximately 30 links. Only Verdi.
Libretti for Italian operas only.
Approximately 350 links, many with Spanish translations.
Approximately 370 links. Italian operas only.
Helmut Weber's libretto list. Approximately 1900 links.
Approximately 60 links.
Libretti for approximately 2/3 of Mozart's work.
Approximately 80 links, mostly greatest hits.
Approximately 170 links.
Approximately 1050 links.
Approximately 70 links, mostly greatest hits.
Approximately 500 links, quite robust.
Approximately 280 links.
Radio broadcasts through SiriusXM of present and past Met Opera productions.
Approximately 120 links to the websites of radio stations focused on classical music and opera.
A monthly(ish) podcast on the world of Opera.
Several Opera Anthologies available, with many art songs.
Approximately 2,500 scores
Approximately 31,000 scores and libretti.
Buy high quality PDFs of many of the arias found on this site. Approximately 5,000 titles.
Over 200,000 titles for sale. The first stop for purchasing scores.
Approximately 4,000 public domain operatic works, multiple scores per work. Extremely well-organized.
Thousands of music scores, organized by collection.
Approximately 2,000 scores
A critical edition of Mozart's entire output.
Approximately 2,600 scores.
Search for: Opera - Approximately 900 scores.
A list of collections of mostly Italian music, including manuscripts of Puccini, Rossini, and Verdi.
Click search, then Search for "Opera", Category "Printed Music", and check "Limit Search". Approximately 300 scores
The digitized holdings of the Rare Book Room. Strong in 18th century French operas.
27 Scores of Jean-Baptiste Lully.
Approximately 160 scores.
Approximately 650 scores.
One of the inspirations for this site, an in-depth database of arias containing translations, fachs, range information, and more.
An exhaustive list of birth and death information on composers, including important compositions.
A large list of operas by composer. In Dutch.
Short biographical snippets on nearly every historical composer whose name doesn't need to be looked up, and many who do.
Contains ~50 synopses, ~60 libretti, and ~50 scores, all Gilbert and Sullivan.
A list of 37 very good online resources for music scholars.
A list of approximately 600 female composers, with links.
An extensive nonprofit database of living composers and their works.
A collection of the digitized music-related holdings of the Bavarian State Library.
A list of 200 female composers to aid in programming.
A part of Stanford University Libraries, as comprehensive a list of information on opera premieres as one could hope for.
A resource containing 1600 operatic works by North American composers.
A database of operas, arias, and composers. Similar to this site in some ways.
An international database of performers, performances and venues.
An archived list of operas, with lists of recordings for the more popular among them.
A potentially dated list of the websites of opera companies.
An extensive list of operas, by composer name.
An index of synopses, libretti, translations, sources, etc. for some of the most popular operas.
Research Notes on many different operas. Search for name or composer.
A Handel-centric site with many useful pieces of information.
A large list of reference recordings for operas.
A collection of over 1800 new and reprint editions of rare vocal works for purchase.
Over 1,000,000 records of music materials.
A database of operatic and musical theater scenes, searchable by voice part.
Approximately 4,600 documents: scores, libretti, and books.
A list of approximately 500 operas by American composers, with synopses where available.
Approximately 2,500 wikipedia pages for operas and their composers.
A yearly list of the most common arias by voice type, as well as other audition resources.
The IAMIC homepage.
On left, under "Type de musique", click "Voir plus", then "Opera". Links to 593 contemporary operas.
Links to 209 operas by Australian composers.
Links to 600 opera and musical theater pieces by Austrian composer.
Links to 4 contemporary Belgian opera composers.
Links to approximately 150 operas by Canadian composers.
Links to approximately 125 operas by Croatian composers.
Search - Composition Name: Opera. Links to approximately 150 operas by Czech composers.
Search - Choose Genre: Opera. Links to 35 operas by Estonian composers.
Links to 359 works for the stage by Finnish composers.
Links to 21 operas by Icelandic Composers.
Links to approximately 140 operatic works by Irish composers.
Links to 16 operas by Israeli composers.
Links to 88 operas by Latvian composers.
Search Category: Stage --> Opera. Links to 68 operas by Lithuanian composers.
Links to approximately 100 operas and operettas by New Zealanders.
Search - Instrumentation: Opera. Links to 119 operas by Norwegian composers.
Search - Musical Category: Opera. Links to approximately 10,000 operas by Portuguese composers.
Links to 50 Slovakian opera composers.
Search - Type of Work: Opera. Links to 611 operas by Swedish composers.