1. Xml.com
XML.com, where the XML community shares XML development resources and solutions, features timely news, opinions, features, and tutorials; the Annotated XML specification created by Tim Bray; authoring tools, XML developer resources, interactive forums...
http://www.xml.com

2. Xml.gov
Extensible Markup Language (XML) embodies the potential to alleviate many of the interoperability problems associated with the sharing of documents and data.
http://www.xml.gov

3. En.wikipedia.org Wiki Xml Page
XML From Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/XML

4. Xml.org
Applying XML and Web Services Standards in Industry
http://www.xml.org

5. Xml.apache.org
The Apache XML Project
http://xml.apache.org

6. Xml.coverpages.org
Online resource for markup language technologies
http://xml.coverpages.org

7. Xmlrpc.com
XML-RPC Home Page
http://www.xmlrpc.com

8. Ibm.com Xml Library Page
The XML library includes a wide range of technical articles and tips, tutorials, standards, and IBM Redbooks.
http://www.ibm.com/developerworks/views/xml/libra~

9. Xmlbeans.apache.org
XMLBeans is a technology for accessing XML by binding it to Java types.
http://xmlbeans.apache.org

10. W3schools.com Xml Page
XML Tutorial on W3 Schools
http://www.w3schools.com/xml

11. Oreilly.com Topic Xml Page
O'Reilly is a leader in technical and computer book documentation for XML.
http://www.oreilly.com/pub/topic/xml

12. Xml.silmaril.ie
The XML FAQ - Frequently-Asked Questions about the Extensible Markup Language
http://xml.silmaril.ie

13. Xml.sys-con.com
SYS-CON's XML Journal
http://xml.sys-con.com

14. Hotscripts.com Xml Index Page
XML on HotScripts.com
http://www.hotscripts.com/XML/index.html

15. Altova.com
Altova XMLSpy XML editor, plus other leading XML, data management, UML, and Web services software tools for application, website, and database development, data conversion, and more.
http://www.altova.com