xdot.py is an interactive viewer for graphs written in Graphviz's dot language. It internally uses the graphviz's xdot output format as an intermediate format and PyGTK and Cairo for rendering. It can be used either as a standalone application from command line or as a library embedded in a Python application.
xml2sql-v is based on expat and is a quick and dirty solution to transform the content of any well-formed XML file into SQL INSERT statements such that you can postprocess the content of the XML data with SQL. The XML file is neither tested for correctness nor is it checked to contain anything reasonable. The insert statements will have the UTF-8 characterset but there are 3 more utilities (entityfix, latin1-utf8, and utf8-latin1), to fix broken HTML entities within the XML files, convert "forgotten" Latin1-Characters into proper XML entities, and convert the output back to Latin1 for easy insertion into the database.
XmlBlaster is XML based MOM (Message oriented Middleware) with a lot of features. It is a publish/subscribe and point-to-point MOM server which exchanges XML-encoded messages. Communication with the server is based on CORBA (using JacORB), RMI, XML-RPC, native socket, or a persistent HTTP plugin. Subscribers can use XPath expressions to filter the messages they wish to receive and add their own MIME-based filter plugins. C/C++, Java, Perl, Python, VisualBasic.net, C#, and PHP client demos are included in the xmlBlaster test suite, and Tcl and Python demo clients are scheduled. XmlBlaster also provides a browser callback framework, allowing browsers (Netscape, Mozilla, MSIE) to receive instant callbacks over a persistent http connection. A security plugin framework allows authentication/authorization in many ways. Currently there are LDAP- and passwd-based plugins available.
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.