- The Ecole Initiative (Early Church On-Line Encyclopedia, covering all aspects of Church history up to 1500 CE: a hypertext encyclopedia of early Church history on the World-Wide Web, including a “growing glossary intimately related to a two-dimensional (temporal and geographical) chronology and a documents page that points to over 100 primary source documents related to early Church history stored on the World-Wide Web”)
- Free Internet Encyclopedia
- Guinness Encyclopedia of Popular Music, 2nd edition, home page
- Latin online dictionary (Latin to Latin, for those not confined to Classical Latin: Reiner Hemmingsen, Vademecum in opus Saxonis, based on Saxo Grammaticus (d. ca. 1220), Gesta Danorum, ed. J. Olrik et al., rev. F. Blatt, vol. II: Index verborum (confecit Franz Blatt), København: Levin & Munksgaard, 1957)
- New Grove Dictionary of Music and Musicians, second edition, including New Grove Dictionary of Jazz and New Grove Dictionary of Opera
- Rap slang dictionary
- Roget’s Thesaurus of English Words and Phrases
- UK/US dictionary
- Webster’s Dictionary