XMLConduit
From the site:
Here is a simple class that allows you to use POST and GET to return XML data from a URL (budget webservice). It works really well, you can just extend it by adding your own required methods, or you could set it up with one generic method that supplies the event type, etc. and you could send it an object with properties instead of specific arguments (so you could loop through and inspect them). Â
http://www.ericd.net/2007/11/as2-class-xmlconduit.htmlÂ
LoadXML
XML loader for AS 3
http://www.mediareason.com/blog/?p=20
xml search class
A neat little class that allows you to search an already loaded xml file. You can search for attributes or node data and you can search for the first match only or you can search recursivly.
http://blog.maxgarfinkel.com/archives/8
XMLParser
From the site:
This class provides an easy way to load and/or send an XML file and parse the data into a format that’s simple to work with. Every node becomes an array with the same name. All attributes are also easily accessible because they become properties with the same name.
http://blog.greensock.com/?cat=3
XMLHightlighter
Use the methods and properties of the XMLHighlighter class to generate the html code to generate color highlighted pretty printed XML.
http://www.shockwave-india.com/blog/actionscript2/?asfile=XMLHighlighter.as
XML2Object
Updated version of Alessandro Crugnola’s XML2Object class found here.
http://www.sillydomainname.com/2006/05/22/actionscript-util-class-xml2object/Â
MXCService
Send/recieve queries to the mxcomm php handler.
 http://www.meychi.com/source/actionscript/classes/MXCService.as
FeedParser
Parses and validates an RSS Feed.
http://www.meychi.com/source/actionscript/classes/FeedParser.asÂ
XMLLoader
XML loading class that resolves scope issues.
http://www.createage.com/blog/?p=104Â
Atom
An AS 2 class to represent and parse Atom feeds.
http://weblogs.macromedia.com/mesh/archives/2004/02/atom_feed_actio.htmlÂ