Clozemaster - Learn a language through mass exposure to useful vocabulary in context.
Pocket - When you find something you want to view later, put it in Pocket.
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.
Keep Everything - Light & Fast Web Archiver for iOS, OS X.
Bialect - Learn languages faster with stories.
WebSatchel - Copy and save web pages to your own personal archive