Dictionary and Reference
Brewer's Dictionary of Phrase and Fable- Giving the Derivation, Source, or origin of common phrases, allusions and words that have a story to tell.
Encyclopedia Britannica - Traditional Encyclopedia Format.
Encyclopedia.com - Substantial entries!
Information Please - Fact-loaded Site
Research-It- Your one-stop reference desk, dictionaries, thesauri, translators.
Roget's II:the New Thesaurus, Third Edition
Word Central- Dictionary and Word Games
World Book Online - Pay site
Wordsmyth- English Dictionary-Thesaurus