Dictionaries & encyclopedias

• One Look (dictionary)
• Your Dictionary
• Open Dictionary
• The Free Dictionary
• Visual Dictionary Online
• Wordnik (dictionary)
• Easy Define (definitions for a list of words)
• Vocabulary
• A.Word.A.Day
• Answers
• Behind The Name (etymology and history of first names)
• Spell Check
• Grammar Check
• The King’s English
• Word Count
• Word Hippo (find similar or opposite words)
• Encyclopedia
• Encyclopedia Britannica
• Information Please
• How stuff works
• Thesaurus
• X Reference
• Rules of Thumb.org
• Murphy's Laws
• Stupid Laws
• Here Are 50 of the Dumbest Laws in Every State
  
• Guinness World Records
• Distances between cities
• Acronym Finder