The Institute for Applied Linguistics, Kent State University
http://appling.kent.edu/

ProZ.com
http://www.proz.com/

American Translators Association (ATA)
http://www.atanet.org/

Word Reference Online Dictionary
http://www.wordreference.com/

Eurodicautom Term Search Database
http://iate.europa.eu/iatediff/SearchByQueryEdit.do