Aria Foundation
- A program that identifies, enriches, and encourages the careers of exceptionally talented native-born or naturalized American opera singers. Includes brief biographies, pictures, and performance schedules for each year's winners.
- http://www.ffaire.com/aria/

OperaGlass
- Includes libretti, source texts, performance histories, synopses and discographies, plus pictures and background information. Extensive links to composers, librettists, operas, companies and people. From Stanford University.
- http://opera.stanford.edu/

Aida's Brothers and Sisters: Black Voices in Opera
- Tells the story of African-Americans in opera from the times of the legendary Paul Robeson. Includes in-depth look at the life of Marian Andersen as well as an interview with Shirley Verrett. From PBS.
- http://www.pbs.org/wnet/gperf/aidas/