The web magazine XML.COM offers this up-to-date list of XML software products with detailed reviews.

David Brownell tests the Microsoft XML parser, as bundled with Internet Explorer 5, for XML 1. (XML.com)

Article by Eric Van der Vlist introducing W3C XML Schema, also includes a reference to the Schema datatypes and structures.

Micah Dubinko asks what microformats are and whether they are here to stay.

A how to covering all the various versions of RSS.

RSS, a simple XML application to describe web site headlines, has had such enormous success that it has been pulled in many directions. By Rael Dornfest, XML.com.

High level introduction to SOAP, UDDI, WSDL. Demonstrates how these technologies fit together to provide a basis for web services and how they compare to older middleware such as CORBA, RMI, and COM.

Article on Pyxie, a "simpler" representation of XML, and its associated tools, programmed in C.

A resource directory enumerating the XML tools available for use within Java servlets.

Downloadable diagram. Shows DOM1 interfaces, attributes, and methods. Useful as overview of the DOM and for looking up the exact method name you need while programming.