Markdown syntax

Block elements

Headings 1-6 and alternate headings

===

Unordered List

Unordered List

Unordered List

Ordered List

Blockquote

Inline elements

italic / italic , bold / bold
Link text or http://domain.com or http://domain.com
code
HTML comment:

Bugs

<html> tags aren't highlighted
Spaces between italic words (only with the single asterisk syntax)
Styles that should overlap do not
(http://example.net "with optional title not hightlighted")