pytables - A hierarchical database package designed to efficiently manage very large amounts of data. [Open Source, BSD] - http://www.pytables.org/moin
Grouch - Web development related open source software packages developed by MEMS and Nanotechnology Exchange. [Open Source, Python license] - http://www.mems-exchange.org/software/
Sisyphus - A module that simplifies running Python stuff as cron jobs. [Open Source, Python license] - http://www.livinglogic.de/Python/sisyphus/
mxBase package extensions for Python - The eGenix.com mx Extensions for Python are a collection of professional quality Python software tools which enhance Python's usability in many important areas such as ODBC database connectivity, fast text processing, date/time processing and web site pro - http://www.egenix.com/files/python/eGenix-mx-Extensions.html
config - Module allows implement a hierarchical configuration scheme for Python applications. - http://www.red-dove.com/python_config.html
Orange - A free, component-based, public domain data mining software, which includes a range of preprocessing, modelling and data exploration techniques. [Open Source, GPL] - http://magix.fri.uni-lj.si/orange/
log4p - The Logging Toolkit For Python, modeled after the Java toolkit log4j. [Open Source, IBM Public License] - http://www.red-dove.com/python_logging.html
txObject ATK - Contains the following parts: Object Library, IO/Timers, Threads, Inter-Process/Distributed Communication. [Open Source, GPL] - http://txobject.sourceforge.net/
ExpectPy - An extension for a Python-feel to the Expect library. [Open Source, LGPL] - http://expectpy.sourceforge.net/
The Snack Sound Toolkit - Module for basic sound handling (sound card and disk I/O); includes primitives for sound visualization, e.g. waveforms and spectrograms. [Open Source, GPL] - http://www.speech.kth.se/snack/
Pexpect - A pure Python module for spawning child applications; controlling them; and responding to expected patterns in their output. It works like Don Libes' Expect. [Open source, Python Software Foundation License] - http://pexpect.sourceforge.net/