TranslateIt! Deluxe is an very fast offline dictionary: Universal and extensible word translation tool ( English, Russian, French,.. etc). No Internet access needed. Works with stardict dictionaries. Command line mode support.
TranslateIt! Deluxe has the following features:

Real translation for words under mouse (no selection required) like Apple Dictionary
English, German and Russian morphology
Nice interface and history.
Useful flexible and customizable user interface.
Color formating output for translated text.
Ultimate free dictionaries...

Скачать TranslateIt! Deluxe for Mac бесплатно на странице загрузки.