The Spanish translation company Trusted Translations, Inc. has launched a portal for English-Spanish translators - http://www.spanish-translator-services.com/ -. Here you have access to free English to/from Spanish localisation resources and tools (English to/from Spanish dictionaries developed by the team of English-Spanish linguists of Trusted Translations, Inc, articles related to English to Spanish translation issues, etc).
You may also want to visit the Spanish translators forum - http://www.english-spanish-translator.org/