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.

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.

Andy Chatbot - Learn and practice English with exercises, grammar and games

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

English AI - Practice conversation in English with AI