Translator Quick launches as a menu tab translator for quick access. What is great about it is that it comes with voice support. The program is easy and simple to use. It is a comprehensive tool, as it supports over 50 languages. The application starts up and stays on the top menu bar close to the clock until you quit.
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.
