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.
Google Translate - Google's free service instantly translates words, phrases, and web pages between English and over 100 other languages.
Drops - Visual language learning.
Subtitles Downloader by Checksub - Sometimes you may want to export or edit the subtitling of Youtube videos that you have uploaded or that you're fans of.
Clozemaster - Learn a language through mass exposure to useful vocabulary in context.
Mate Translate - Ultimate translation app for Mac, iOS, Chrome and many more