ColdFusion XML Toolkit
XML References

XML References

torchbox.com/xml
Home of the CF XML Toolkit, as well as the CF-XML mailing list
SiteObjects
Brett Suwyn's so_XML tag comes with a useful tutorial and provides an excellent introduction to using XML in your ColdFusion applications
Granularity
A Java-based CFX tag for XSL transformations within ColdFusion

World Wide Web Consortium (W3C)
Dry but very comprehensive, the World Wide Web Consortium's XML site provides resources on XML Schema, XML Query, XLink and many other XML standards.
The Apache Group
The people who brought you the world's most popular web server are committed to providing 'commercial-quality standards-based XML solutions that are developed in an open and cooperative fashion'.
Microsoft
Redmond have embraced the open standards of XML with surprising fervour: this site is a useful resource of XML best practices, particularly within the context of MSXML.

XML.com
The primary resource for XML news - useful for managers as well as coders
XML Hack
A developer-orientated XML portal
Moreover XML news
Click here to subscribe to Moreover's daily digest

XPath visualiser
An impressive client-side tool for learning XPath - the primary query language for XML documents
XPath tutorial
Comprehensive XPath tutorial from zvon.org

Produced by Tom Dyson of Torchbox, and David Maddison of Wildfusion