Glosbe - Huge collaborative massively multilingual dictionary.
VerbAce - VerbAce-Pro is an easy-to-use Desktop Translation Software. Translate in a mouse click
Wordnik - the biggest online English dictionary, by number of words
Visuwords - The fun and free way to look up definitions. THE graphical dictionary and visual thesaurus.
DocTranslator - Instantly translate and keep the formatting of any document in any language. Free!
NextDict Dictionary - NextDict is a multi-language dictionary and a collection of the most complete English references...