py-xmlrpc is an extremely fast implementation of the xmlrpc spec for Python (written in C). It supports both blocking and non-blocking clients and servers on Windows and POSIX platforms. Version 0.8.1 is 100% compliant with the xmlrpc validator found at http://validator.xmlrpc.com.
Python-mhash is a Python interface to the mhash library, which provides a uniform interface to a large number of hash algorithms. These algorithms can be used to compute checksums, message digests, and other signatures. The HMAC support implements the basics for message authentication, following RFC 2104.
Python-mcrypt is a comprehensive Python interface to the mcrypt library, which provides a uniform interface to several symmetric encryption algorithms. It is intended to have a simple interface to access encryption algorithms in ofb, cbc, cfb, ecb, and stream modes. It supports algorithms like DES, 3DES, RIJNDAEL, Twofish, IDEA, GOST, CAST-256, ARCFOUR, SERPENT, SAFER+, and more.
The sourcecode XML metadata extraction tools are intended to be used for extracting and transforming XML-like markup embedded in source code comments into syntactically correct external entities or well-formed XML files. This can be used for JavaDoc-like code annotation, providing structured comments, or even embedding metadata used by the build process or configuration management tools.
pyNMS is a set of Python modules for network management, network testing, systems management, and general use. It contains a nearly complete implementation of SNMPv2c, a SMI/MIB package, and a MIB "compiler". There are many others, such as a telnet/console access class, XML tools, an IPv4 class, etc. There is, unfortunately, little documentation, and not everything works properly yet, but they work well enough to be useful for many things.