I continue working on Markdown parser and for now it already supports:

• span elements (bold, italic, inline images links and code)
• settext and atx headers
• code blocks
• blockquotes, partly supported for now (in some cases output differs from original Markdown output)
• horizontal rules
• backslash escaping for special chars (\*, \`, etc)

It took much more time than I planned to implement all this stuff. The process
of writing a good syntax definition to support all possible cases appeared to
be very tricky. However I'm moving on.

Things that are left:

• lists
• paragraphs
• reference-style links and images
• autolinks

Here is the latest test you can play with - languages test.
For more info on Markdown's syntax you can visit official Markdown syntax documentation.