Mou

I like clean and neat text editors but have great abilities, one example is Mou, markdown editor for developers.

Unfortunately, this Mou can only be used by Mac users.

Mou is a Markdown editor for developers, on Mac OS X. Features live preview, sync scroll, auto save, powerful actions, auto pair, custom themes and CSS, HTML and PDF export, enhanced CJK support and more. (Source)

If you are a Mac user, you can try using this Mou text editor.