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.
calibre - Ebook manager, viewer & converter
Memrise - Learn a new language with games, humorous chatbots and over 30,000 native speaker videos.
FBReader - FBReader is an e-book reader for various platforms. Features:
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 .
Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.