Takoboto - Japanese dictionary & Japanese language learning tool.
zkanji - zkanji is a free and open-source study tool and dictionary of the Japanese language.
Sumatora - Offline Japanese dictionary for Android
Handy News Reader - Handy News Reader is a free no-ads RSS reader for reading offline contents from RSS feeds or web sites without RSS feeds.
Rikaichamp - Look up Japanese words with the hover of a mouse.
Jisho - Powerful and easy-to-use online Japanese-English dictionary with words, kanji and example...