US Open Directory Project

Directory of Spanish English, English Spanish dictionaries List of Spanish-English, English-Spanish dictionaries and translators on the web by an experienced native professor and useful Spanish links.
http://www.spanishnewyork.com/spanish-translators-spanish-dicctionaries-on-line.html#Directory of Spanish English Dictionaries on the Web

Diccionarios.com Bidirectional translations between Spanish and: English, French, German, and Catalan. Requires cookies, JavaScript, and a 4.0 or later browser.
http://www.diccionarios.com/

English-Spanish Word List of Common Computing Terms Very few basic words.
http://www.css.qmul.ac.uk/foreign/eng-spanish.htm

COES: Herramienta Ling��stica de Libre Distribuci�n para la Lengua Espa�ola Set of data files that implements a Spanish (castellano) dictionary with 52,000 roots (approx.) and their derivated forms. Includes Spanish spelling dictionary. Based on Unix tool ispell. Distributed under GNU "General Public License of the Free Software Foundation".
http://www.datsi.fi.upm.es/~coes/espell_readme/espell_readme.html