Dictionaries, Encyclopedias, Almanacs, Etc.

• Acronym Finder
• Almanac Online from The Old Farmer's Almanac
• ARTFL Project Public Reference Tools, from University of Chicago 
  Includes Webster's Revised Unabridged Dictionary 1913 and 1828 editions , Roget's Thesaurus 1911 edition; French-English Dictionary; French Conjugator
• ASL Fingerspelling
• Bible Weights and Measures
• Common Weights and Measures From the College of Chemistry, University of California, Berkeley
• Credo Reference - Search hundreds of reference books at once in subscription database
• Excalibur - open source MacIntosh spell checker
• Flags of All Countries
• Free Translation
  Translates passages from & to many languages, including Braille & Sign language
• Google Features
  Maps, Catalogues, Translations, Stock Quotes and more
• InfoPlease
• Interactive Units Converter
• Internet Acronym Server
• iTools
• Library Spot's Calculators
• Latin Quotes and Phrases
• LookLex Encyclopaedia - Dictionary of world culture
• Math.Com's On-Line Calculators
• Malaspina Great Books 1995-2009
  Student Research Database
• MedLine Plus Medical Dictionary
• Merriam-Webster Online
• Missouri Annual Vital Statistics
• NASA
• Net Lingo - Internet Dictionary
• OANDA Currency Site - Conversion for Currencies of 173 Countries
• Office of Weights and Measures
• Official U.S. Time
• OneLook Dictionary Search
• Rhyme Zone Rhyming Dictionary
• Visual Dictionary On-Line from Merriam-Webster
• What Is
  Internet and computer terms.
• Wikipedia
  The Free Encyclopedia that anyone can edit
• The Word Detective
  A page by Evan Morris whose column on words and language appears in newpapers worldwide.
• Word Plays: Sites that Feature Fun with Words
• Word Web
  Dictionary, thesaurus, anagram finder and more - Free & paid versions
• World Clock - Time Zones
• Yahoo Dictionaries
• Zip Code Plus Four Look-up