French Translation Engines

Google Translate Tool - Translate text or a web page from French to English, or English to French, plus a number of other languages. Links in the page translated with the web page translator will also render in the new language.
Translated.net Online Translation Engine - Translation service with free online translations of text from French to and from English, Chinese, German, Greek, Italian, Japanese, Korean, Portuguese, Russian, and Spanish, with a large variety of technical and specialty lexical databases.
Dictionary.com Translation Engine - Translate text from French to English and vice-versa, plus a number of other language combinations.
ProMT Online Translation Engine - Provides online translations for French-English and English-French, with a number of other language options; also displays back-translation of the translated text.

 

 

  French Dictionaries

Le Dictionnaire - French dictionary with grammatical constructions, synonyms, and encyclopedia
Dictionnaire de la langue francaise - Site offers a dictionary of the French language, synonyms, conjugations, and French-English and English-French dictionaries. Javascript interface.
Le Grand Dictionnaire Terminologique anglais-francais - French interface, provides dictionary translations for technical terminology to and from French, English, and Latin.
Lexilogos - Type a word in the form and choose queries from the Reverso, Larousse, WordReference, Collins, Google, BabLa, Mediadico, Ultralingua, Linguee, Eurocosm, and Terminology dictionaries; also includes links to a number of other French information sources.
LookWAYup Dictionary - French-English dictionary, also includes English-French; click "More" for thesaurus and synonyms; double-click a word in the definition to define it.
LingvoSoft French-English Online Dictionary - Bilingual French-English dictionary; site also includes a multilingual dictionary with 25 languages.
Word Reference French-English Dictionary - Bilingual French-English dictionary with downloadable translation toolbar.
Freedict French-English and English-French Dictionary - Simple word translations without additional information.
Ectaco Online French-English Dictionary - French-English bilingual dictionary; site also includes 21 other languages.
Dict.info French Dictionaries - A collection of free French bilingual dictionaries for English, Czech, Danish, Dutch, Esperanto, German, Italian, Japanese, Japanese Romaji, Portuguese, Slovak, Slovenian, Spanish, Swedish, Turkish, and Walloon. Browsable online, with word searches, and downloadable data files.

 

 

  Scholarly and Historical

Le Trésor de la Langue Française (TLFi) Dictionary
ARTFL Project: Dictionnaires d'autrefois - French dictionaries of the 17th, 18th, 19th and 20th centuries: simultaneously queries Jean Nicot's Thresor de la langue française (1606), Jean-François Féraud's Dictionaire critique de la langue française (Marseille, Mossy 1787-1788) and the Dictionnaire de L'Académie française 1st (1694), 4th (1762), 5th (1798), 6th (1835), and 8th (1932-5) editions.
ARTFL Project: Jean Nicot's Thresor de la langue française (1606)
ARTFL Project: Jean-François Féraud's Dictionaire critique de la langue française (Marseille, Mossy 1787-1788)
ARTFL Project: Dictionnaire de l'Académie française, First Edition (1694),  (1762), Fifth Edition (1798), Sixth Edition (1835), and Eighth Edition (1932-35).
ARTFL Project: Robert Estienne's Dictionarium latinogallicum (1552)
ARTFL Project: Pierre Bayle's Dictionnaire historique et critique (1774)

 

 

  Technical and Specialty

Le Grand Dictionnaire Terminologique anglais-francais - French interface, provides dictionary translations for technical terminology to and from French, English, and Latin.
Collins - Reverso English-French Medical Dictionary - Medical dictionary with English-French bidirectional translations.
EcoMate2000 - Electronic Dictionary of Finance EN/FR FR/EN; search economic terms in English and French.
Dictionnaire économique - French dictionary of economics in HTML format, alphabetical index.
Collins - Reverso English-French Business Dictionary - Business dictionary with English-French bidirectional translations.
Collins - Reverso English-French Computer Dictionary - Computer and information technology dictionary with English-French bidirectional translations.
Le Jargon Francais - A monolingual French computer and information technology dictionary in a wiki format, with contributions by users.
EBSI IT Glossary - Monolingual French glossary of information technology terms.
French-English-French Dictionary of Wine Economic Expressions - HTML dictionary of wine expressions in French and English.