TITrans is a very useful application that allows you to quickly translate any text string to different languages. Using this program, simply input the text, select the target language an press translate. TITrans requires an internet connection to perform the translation.
One World Dictionary by Ascendo is a leading multilingual reference tool for Apple desktops.
InstantTranslate makes it really easy to translate a selection of text in the application you are working in from one language to another language.
