CodeSynthesis XSD - A cross-platform W3C XML Schema to C++ data binding compiler. Provided with an XML instance specification (XML Schema), it generates C++ classes that represent the given vocabulary as well as parsing and serialization code. [Open Source, GPL] - http://www.codesynthesis.com/products/xsd/
Simple XML Persistence Library - A lightweight C++ library for object serialization in XML. [Open Source] - http://sxp.sourceforge.net/
C++ Wrappers for the Expat XML Parser - Describes an implementation of a C++ wrapper to the expat XML parser API. - http://www.codeproject.com/soap/expatimpl.asp
expatpp - A C++ wrapper for the expat XML parser. - http://www.oofile.com.au/xml/expatpp.html
CMarkup - A C++ source class for parsing and creating XML based on the EDOM API, with articles and documentation. - http://www.firstobject.com
Xerces C++ Parser - A validating XML parser written in a portable subset of C++ by the Apache project. - http://xml.apache.org/xerces-c/
Arabica - An XML parser toolkit, providing SAX2 and DOM implementations, written in Standard C++. - http://www.jezuk.co.uk/cgi-bin/view/SAX