Takoboto - Japanese dictionary & Japanese language learning tool.
zkanji - zkanji is a free and open-source study tool and dictionary of the Japanese language.
Jisho - Powerful and easy-to-use online Japanese-English dictionary with words, kanji and example...
Akebi Japanese Dictionary - Offline Japanese-English kanji dictionary.
Rikaichamp - Look up Japanese words with the hover of a mouse.
Nani? - Offline Japanese dictionary for Android.