Flex Formatter
Submitted by Lmg on 2. March 2009 - 20:26.
This is an Eclipse editor tool to provide source code formatting for Adobe Flex code (i.e. Actionscript and MXML). It provides a small set of formatting options which hopefully covers the most popular coding conventions.
-> http://sourceforge.net/projects/flexformatter/
you should be able to just drop this plugin in the "plugins" dir (or "dropins" dir if you are using Eclipse 3.4 or greater) and restart Eclipse with the -clean argument.