Vocalex English is a program available for those of you who wish to expand your vocabulary in English.
With the help of Vocalex you can quickly and easily learn new words for your daily life. Vocalex English works as a digital dictionary, written entirely in English, where the words are explained by way of illustrations instead of translations.
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.