Clozemaster - Learn a language through mass exposure to useful vocabulary in context.
JA Sensei - Complete suite to Learn Japanese !
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.
Akebi Japanese Dictionary - Offline Japanese-English kanji dictionary.
Bialect - Learn languages faster with stories.
zkanji - zkanji is a free and open-source study tool and dictionary of the Japanese language.