Drops - Visual language learning.
Clozemaster - Learn a language through mass exposure to useful vocabulary in context.
Vocabulary Miner - Flashcard app with offline learning, spaced repetition, no ads, export & import, statistics...
Lingualia - Learn Languages Online. Lingualia is a revolutionary new way to learn languages which learns from you and adapts the course to your needs. Discover a personalised language learning experience.
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.
Multilingual - A command-line application that automatically translates the input sentence to multiple languages adds the translations to respective translation JSON files