Mark Down

Markdown is a WikiSyntax that resembles plain text e-mail formatting. It is the default markup used in IkiWiki. Also supported by InstikiWiki.

See http://daringfireball.net/projects/markdown/syntax

Perhaps more famously, Reddit uses MarkDown.

--PaulMiller

There is a tool called PanDoc which can convert between MarkDown and ReStructuredText and a number of other TextFilter formats.

CategoryTextFilter