Editsaurus - Highlights potential pitfalls in your writing to encourage good habits.

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

Grammarly - Clear, effective, mistake-free writing everywhere you type.

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.

Slick Write - Slick Write checks your writing's grammar and style for free!

Drops - Visual language learning.