Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.
JA Sensei - Complete suite to Learn Japanese !
Clozemaster - Learn a language through mass exposure to useful vocabulary in context.
Akebi Japanese Dictionary - Offline Japanese-English kanji dictionary.
Busuu - Join the global language learning community, take language courses to practice reading, writing, listening and speaking and learn a new language. Learn English with busuu's .
zkanji - zkanji is a free and open-source study tool and dictionary of the Japanese language.