Grammarly - Clear, effective, mistake-free writing everywhere you type.
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.
Typewriter - Your on-demand editor
Linguix - AI-enabled writing tool for writers, editors, and businesses
Prosepaper - A text editor with better word suggestions
Grammar Snob - Markup your friends' iMessages like an English teacher 😁