MarkMyWords 2.3.0 macOS

Features
Support of a variety of markup-languages
Live-preview of the content and possibility to add own CSS-stylesheets
Use of text-templates and markers for quick text navigation
Easy import of text-data from popular RSS-readers and web-browsers
A flexible fullscreen-modus
Plugin System
And more little tricks to straighten the writing task
MarkMyWords supports the markup-languages BBCode, Markdown, MultiMarkdown, MarkdownExtra, Smark, Textile, and Wikitext and offers a preview of the formatted output as it would be displayed on webpages immediately. Of course you can use plain HTML to format your text, too.
Compatibility: macOS 10.10 or later