The online dictionary of the UK Cambridge University Press. 

From the beginning, the aim behind lexicool.com has been to create a complete and efficient search utility for linguists, especially translators and interpreters. The site is run by an international team of linguists and IT specialists based in France. The team's main task consists of finding and classifiying all bilingual/multilingual glossaries published freely on the Net.

One of America's largest online dictionaries.

Search Roget's Thesaurus free online at Bartleby.com, an internet publisher of reference, literature and verse.

Altavista.com provides this online translation facility for either websites or pasted text. Take care to only translate small paragraphs at a time.