Typopo VS Fluently Beta

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

Fluent - Fluent is a people-based marketing platform that uses real-time, one-to-one interaction to create custom audiences and serve personalized ads that drive performance at scale.

ProWritingAid - For the smarter writer. A grammar checker, style editor, and writing mentor in one package.

Writefull - Writefull provides you with the tools you need to improve the quality and consistency of your writing.

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.

Expresso - The award-winning Expresso editor is equally suitable as a teaching tool for the beginning user of regular expressions or as a full-featured development environment for the experienced programmer with an extensive knowledge of regular expressions.