BookKeeper is a citation application for writing papers. It currently formats bibliographies and endnotes in the MLA style and also formats outlines. Additional styles are available as plug-ins. All you supply is the information, and BookKeeper will add in the punctuation and other details.
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.
