Writage is described as 'new add-in for Word, which enables to edit Markdown documents. Zero knowledge of Markdown is required in order to write structured documents. No need to remember markup for hyperlink or footnote, or how to format a table'. There are more than 50 alternatives to Writage for a variety of platforms, including Mac, Windows, Linux, Online / Web-based and iPhone. The best alternative is Joplin. It's not free, so if you're looking for a free alternative, you could try Typora or Mark Text. Other great apps like Writage are ghostwriter (Free, Open Source), StackEdit (Free, Open Source), Hemingway Editor (Paid) and Haroopad (Free, Open Source).
Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor.
No excuses. No distractions. Just write. ghostwriter is a feature-rich text editor using Markdown syntax which makes it suitable for note-taking, document redaction, simple HTML website creation and much more.
Haroopad is a markdown enabled document processor for creating web-friendly documents. You can author various formats of documents such as blog article, slide, presentation, report, and e-mail as if experts did.
ReText is a simple text editor for Markdown and reStructuredText documents with syntax highlighting and optional live preview. It is written in Python using Qt libraries, able to run on any platforms (Linux and BSD are officially supported).