Here are the links for all other platforms.  Just drag them to your "link bar" or "personal toolbar" or add to your Bookmarks/Favorites to create a bookmark out of them.  Please note that we haven't thoroughly tested them.  Also note that they probably don't work with frames-based web pages.

Firefox/Mozilla/Netscape/Safari and maybe others:

English to Spanish: =>Spanish
English to French: =>French
English to Italian: =>Italian

Spanish to English: =>Inglés
French to English: =>Anglais
Italian to English: =>Inglese

Spanish to French: =>Francés
Spanish to Portuguese: =>Portugués
French to Spanish: =>Espagnol
Portuguese to Spanish: =>Espanhol

English definition: =>Definition
Definición Inglés: =>Definición

Special thanks to Roberto C. Redondo Melchor of the Universidad de Salamanca for the Firefox/Mozilla/Safari script!