Bilingua - Bilingua: your language exchange app & learning companion.
JA Sensei - Complete suite to Learn Japanese !
LingQ - Learn languages by immersing yourself in a world of interesting, authentic content!
Akebi Japanese Dictionary - Offline Japanese-English kanji dictionary.
Mondly - Learn 33 languages in 500 bite-size lessons and 14 conversational modules.
zkanji - zkanji is a free and open-source study tool and dictionary of the Japanese language.