Marked is one of my favorite apps for OS X -- a previewer for Markdown, MultiMarkdown, Fountain and other text markup, with some very good "writing analysis tools". The author, Brett Terpstra, is blogging about updates in the forthcoming Marked 2.5

http://brettterpstra.com/2015/08/18/marked-2-dot-5-sneak-peek/

Marked plays well with Ulysses, nvAlt (also by Terpstra), Sublime Text, and almost any text editor on OSX -- as well as MindNode, iThoughtsX. It's one of those apps that you use and say to yourself "I never would have thought I needed this -- but I do".

Is there any similar application for Windows?