Eng-Japan Dictionary is a *FREE* English->Japanese dictionary containing more than 188,000 entries. The dictionary does not require an Internet connection and can be consulted at any time: no crazy roaming charges or blackout times while on a flight! The only time you may need a data connection is if you click on a link in the help section
Japanese Translator - English-Japanese & Japanese-English translator using Google Translate API.It provide a friendly ui.
Text to speech function is aviable
JPDictionary - This is Japanese dictionary app.
You can use many dictionaries from "イースト辞書webサービス".
It contain Japanese keyboard. So you can use Japanese for search.
※Some labels in it is displayed in Japanese
Lost In Translation - Lost In Translation lets you type in a sentence or two, and then uses a translator to translate it back and forth from English to Japanese until some sort of balanced is reached.
The results are either nonsensical, boring, or strangely insightful.
You can also vote on what new features you want
Tango Master is an intelligent Japanese vocabulary learning application. Review words in over 40 prebuilt lists containing more than 24,000 total words. By taking quizzes, Tango Master can track your progress. You'll be quizzed more often on items you are having trouble with, and less on those you know well