Translate App offers an easy solution to translate text in many languages. You will get definitions, examples of usages in a sentence, and synonyms. If you want to view your translation outside the menu bar, you simply open the menu bar app and click on the window mode button. You may set the menu bar panel to float on top of all windows, so that you can have the tool right there at hand when you need it.
InstantTranslate makes it really easy to translate a selection of text in the application you are working in from one language to another language.
One World Dictionary by Ascendo is a leading multilingual reference tool for Apple desktops.
