Grammarly - Clear, effective, mistake-free writing everywhere you type.
Wordtune - AI-powered writing companion
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.
Grammatica - AI powered writing assistant
Hemingway - Hemingway App makes your writing bold and clear.
Linguix Writing Coach - Improve your language skills while writing online