BBC languages site offering in-depth online courses for a variety of foreign languages including Spanish, Italian, German, French, Portuguese, Chinese, Greek -- 40 languages in all.

Tools for learning a wide variety of foreign languages.

Free language-learning lessons, games and activities.

A wide variety of languages available. (Requires iTunes)

Free lessons in 23 languages.

Translations of approximately 20 languages, ranging from colloquial and regional expressions to more technical or field-specific vocabulary. Special features include search filters, synonyms, pronunciation, sample sentences.

16 languages are included. Does carry some advertising.

Based on Open Directory, plus. Includes free encyclopedia (Wiki). Many languages are selectable by clicking flags. Automatic translation seems to get hung up.

Dictionaries for a variety of foreign languages.