
GenerateLocalizableStrings allows you to create more than 40 foreign language Localizable.strings or InfoPlist.strings files. It uses Google's translate api, so you have to register an account with Google, and secure an api key from them to use with this app.
Supported languages include: Arabic, Chinese (simplified and traditional), Croatian, Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Latvian, Malaysian, Norwegian, Polish, Portuguese, Romanian, Russian, Slovakian, Spanish, Swedish, Thai, Turkish and Vietnamese.
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.