French Dictionaries

• Anglo-Norman Dictionary http://www.anglo-norman.net/gate/

• Centre National de RessourcesTextuelles et Lexicales http://www.cnrtl.fr/definition/

• Collins French Dictionary http://www.collinsdictionary.com/dictionary/french-english

• Dictionnaire du MoyenFrançais http://www.atilf.fr/dmf/

• Le Dictionnaire vivant de la langue française http://dvlf.uchicago.edu/

• Lexilogos an exhaustive website for the study of Old French language and literature, including the authoritative historical dictionaries of  F. Godefroy (specializing in the language between 1330-1500),  F. Lacombe, and others; it also includes many texts on Old French grammar and Latin; plus links to Old French poetry.  All available on-line and free of charge.
  http://www.lexilogos.com/francais_dictionnaire_ancien.htm

• Word Reference – free Modern English translation dictionaries for Modern French, Spanish, and Italian http://www.wordreference.com/index.htm