xmlrpcserver is a simple to use but fairly complete XML-RPC server module for Python, implemented on top of the standard module xmlrpclib. This module may, for example, be used in CGIs, inside application servers or within an application, or even standalone as an HTTP server waiting for XML-RPC requests. xmlrpcserver is completely written in Python and has no dependencies other than standard modules.
xopus is a browser-based (Mozilla, IE) in-place WYSIWYG XML editor. It works similarly to a word processor, and uses XSLT stylesheets to transform the XML to user-presentable HTML and XML Schema to preserve the XML validity. A commercial version with table, rich text, and enumeration editing is available as well.
xpath2rss is an XPath to RSS scraper. XPath makes a better HTML scraper than regex (the typical solution) because it understands the structure of the document, rather than just treating it as a big string. As a result, xpath2rss is a more reliable scraper, and much easier to use, once you get the hang of XPath.
The xsd2db package is used for converting XML Schema Definition files into DocBook XML code. The transformer can also be used to generate DocBook XML from plain XML files. It marks up tag names, attribute names, attribute values, and annotation, if parsing XSD code. The resulting DocBook XML code may be styled so that you have syntax highlighted XML code.
xsddoc is a documentation tool for W3C XML schemas based on XSLT. This multiple schema documentation generator creates JavaDoc like documentation of your W3C XML schema. It is platform independent and usable from the command line, as an Apache Ant task, or as an Apache Maven plugin.