WYSAWIG - What You See is Almost What You Get edit
Wysawyg is a syntax highlighting editor for MediaWiki, which makes the text you edit look like the finished formatted text. It's in an early stage of development, but it can already handle most of wiki syntax. It currently doesn't handle {| tables, ;: data definitions and is very buggy for indented pre-formatted text. Template calls are currently always shown in expanded format, which will change to a setting in the future. Please direct all wishes, bug reports and general thoughts to User talk:Zocky.
To install add the following text to your monobook.js:
document.write('<'+'script type="text/javascript" src="'
+ 'http://test.wikipedia.org/w/index.php?title=User:Zocky/wysawyg.js'
+ '&action=raw&ctype=text/javascript&dontcountme=s"></'+'script>');