TheRightMargin - TheRightMargin is a smart writing tool.

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.

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

Analyze My Writing - Analyze My Writing is an online text content and readability analyzer.

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

Hemingway - Hemingway App makes your writing bold and clear.