Hemingway - Hemingway App makes your writing bold and clear.

Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.

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

Anchor CMS - Free and lightweight blogging system

Write App - No-distraction writing tool for your productivity.

Textpattern - Textpattern is an elegant content management system that is free, open source software.