MWeb can handle professional-level markdown with support for markdown extensions. It provides publishing to various social networks and blogging formats, as well as various preview themes. It also has two work modes: external, which allows the addition of external folders; and library, designed for note-taking and static blogging.

Features:

• Full GFM (GitHub Flavored Markdown) supported
• Publish/Update to Wordpress, Metaweblog API services, Wordpress.com, Evernote, Blogger, Tumblr.
• Drag-and-drop or paste to insert pictrue and display immediately.
• Live preview and export to PDF/HTML/RTF/DOCX
• External folder, library, static blog/website generator

For more info, please check out this video.