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Tresor De La Langue Francaise,
Incredible dictionary - very high level - suitable for teachers or highly advanced students - has in-depth definitions with usage examples of the French language.
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L'anglais Des Affaires : Business English Glossary
Businsess terminology - English/French or French/English listing of terms relating to business, banking, buying, selling etc. Very easy to use - has some phrases e.g. "cancel an order" = "annuler une commande".