Zvon.org Covers different aspects of XML, ranging from a basic introduction to programming references and advanced tutorials. A good place to learn more about the versatility of XML.

PerfectXML For the more technically oriented, PerfectXML, is a great site. The site’s main focus is XML and related technologies for business people and technologists – both from a practitioner and learner perspective. To that end, PerfectXML provides thousands of quality, well-organized links as well as other services in the form of articles, tutorials, book excerpts, news updates, searchable Knowledgebase articles, XML-jobs search, & much more.

XML.com By O’Reilly, features a rich mix of information and services for the XML community and how this technology can solve real-world problems in information management and ecommerce. Good source for RSS info as well.

Developer’s Dex Offers the latest and greatest information on ASP, C++, SQL, VB and XML. If you’re looking for articles, tutorials, books, sample code, FAQ’s and more, then this site is for you.

PerfectXML Covers different aspects of XML, ranging from a basic introduction to programming references and advanced tutorials. A good place to learn more about the versatility of XML.

SoftXML.com Have been around since the inception of XML and specialize in the development of XML projects. The site offers a variety of XML tutorials and guides along with other website programming and development tutorials.