
Kanji Crammer is an Open Source slide show/flash card program for learning Japanese Kanji, also known as Chinese characters. In addition to decks for Japanese and Chinese, it is able to use decks, which use other scripts, like Korean, English, and Thai. Requires Mac OS X (10.2 or better). Supports audio and various dictionary files. Good for learning vocabulary. Kanji Crammer can also be used by linguists in the field for recording the native pronunciations of the word lists. It will organize the recordings and make it easy to begin analysis once in the lab.
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.