Textile

Textile
Textile - SWiK

Textile is a web text markup-language that balances the strength of HTML with speed and ease of editing.

Unlike many wiki or other markup languages, Textile sticks closely to the semantics of HTML, headings for example are represented by ‘h1’, ‘h2’ for <h1> and <h2>. Attaching classes and ids to elements is also easy with Textile.

Textile is used by both blogs and a number of wikis, including the Ruby on Rails instiki powered wiki and by SWiK. Textile does not make a provision for wiki links however, so various wikis have interpreted their own wiki link standards.

http://jrm.cc/extras/live-textile-preview.php