1. 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

2. Xml.apache.org - Project Downloads
XML Apache features different project downloads available to users interested in XML.
http://xml.apache.org

3. Xml.com - Software Resource
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

4. Xmlwriter.net
XML Editor, XMLwriter for Windows, is a powerful award-winning XML development tool that supports XML, XSLT, DTD, XSD Schema, CSS, and HTML editing. Within the editor you can convert XML to HTML using XSLT stylesheets, or format and preview XML documents
http://www.xmlwriter.net

5. Xmlrpc.com
Simple cross-platform distributed computing, based on the standards of the Internet. "Does distributed computing have to be any harder than this? I don't think so." -- Byte . It's a spec and a set of implementations that allow software running on
http://www.xmlrpc.com

6. Softwarecasa.com - XML Software
SoftwareCasa Software Download Store. Offers a large assortment of software for the XML User
http://www.softwarecasa.com

7. Xmlfox.com
XMLFox XML/XSD editor is the Windows based graphical tool for authoring, updating, exploring, well-formedness checking or validating XML documents. XMLFox is a graphical XML editing and validation tool for creating valid, well-formed XML documents and/or
http://www.xmlfox.com

8. Exchangerxml.com
Exchanger XML Editor is a professional multi platform XML development environment which allows for Validation, Transformation, Viewing and Editing of XML in 4 different views, with extensive support for XML Schema, RelaxNG and DTD based
http://www.exchangerxml.com

9. Xmlblueprint.com
XML editor and validator of XML documents, DTDs, Relax NG Schemas and XML Schemas. Provides XSLT transformation and preview in built-in browser. Unicode support.
http://www.xmlblueprint.com

10. Extol.com - XML Software
Business integration software targeting multiple B2B challenges delivered on a common platform for complete integration, supply chain collaboration and linking applicaitons, processes, data and events
http://www.extol.com

11. Webxsystems.com
Integrated XML/SGML Enterprise Publishing Software S1000D Solution
http://www.webxsystems.com

12. Xml.org - Software Resources
XML. Org offers a large amount of software to the XML user. They have a wide array of different types of software for your XML coding.
http://www.xml.org

14. Softxml.com - Tutorials
Softxml.com has an extensive database of different tutorials for fully utilizing XML.
http://www.softxml.com

15. Xmlspy.com
Altova XMLSpy® 2008 is the industry-standard XML editor and development environment for modeling, editing, transforming, and debugging XML-related technologies.
http://www.xmlspy.com