Kanji Go

Kanji Go is a Mac OS X application designed to make it easy to lookup and review Japanese and Chinese.

Look up words from and to Japanese and Chinese, English, Russian, German, and French
Find Kanji by Radical, Reading, Meaning, Stroke Count, or SKIP index
Create, print, import/export, and publish custom vocabulary lists
Study using customizable digital flash cards - via traditional or Spaced-Interval methods
Quiz Mode with adjustable difficulty and styles
View conjugations for all Japanese verbs and adjectives
Use Romaji, Kanji, and/or Kana when searching and viewing entries