- Academy of Vocal Arts (AVA) [Added: Aug-2-2012]
- Accademia Nazionale di Santa Cecilia [Added: Aug-2-2012]
- Associazione Lirica e Concertistica Italiana (As.Li.Co) [Added: Aug-2-2012]
- International Vocal Arts Institute (IVAI) [Added: Aug-2-2012]
- Luciano Pavarotti Foundation [Added: Jan-19-2014]
- Mannes College the New School for Music [Added: Aug-2-2012]
- New York City Opera [Added: May-12-2017]
- Opera Actual [Added: Aug-2-2012]
- Operalia World Opera Singing Contest [Added: Aug-26-2013]
- Pine Mountain Music Festival [Added: Aug-2-2012]
- The Metropolitan Opera [Added: Aug-2-2012]
- V.O.I.C.Experience! [Added: Aug-2-2012]