Dictionaries

The most importants: Wikipedia, and Dictionnaire des synonymes français

Translate words, phrases, entire texts and even html documents with Babelfish.
And if you want a large choice of languages, visit Freelang.

Lookup the definition of an English word with Cambridge, or if you don't know the spelling, with Webster.

Hungarian - English and vice versa.

English etymology.

French words explained in French.
Troubles writing in French? Conjugaison.

Translate texts - even from Japanese..

Still want more: Dictionaries on Google Web Directory.

FreeDictionary, Encyclopedia,..

Geographic names database with location coordinates: Getty Thesaurus of Geographic Names