Zubtitle - Zubtitle is an online tool that makes it easy to add captions to any video.

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.

VEED Subtitle - A simple & fast way to add subtitles to your videos online

Drops - Visual language learning.

Subtly - Learn English with smart subtitles on movies and TV shows

Clozemaster - Learn a language through mass exposure to useful vocabulary in context.