Graphical interface

wxPython

http://wxpython.org

Graphical interface

pyGtk

http://www.pygtk.org

Graphical interface

pyQT

http://www.riverbankcomputing.co.uk/pyqt/

Graphical interface

Pmw

http://pmw.sourceforge.net/

Graphical interface

Tkinter 3000

http://effbot.org/zone/wck.htm

Graphical interface

Tix

http://tix.sourceforge.net/

Database

MySQLdb

http://sourceforge.net/projects/mysql-python

Database

PyGreSQL

http://www.pygresql.org/

Database

Gadfly

http://gadfly.sourceforge.net/

Database

SQLAlchemy

http://www.sqlalchemy.org/

Database

psycopg

http://www.initd.org/pub/software/psycopg/

Database

kinterbasdb

http://kinterbasdb.sourceforge.net/

Database

cx_Oracle

http://www.cxtools.net/default.aspx?nav=downloads

Database

pySQLite

http://initd.org/tracker/pysqlite

MSN Messenger

msnlib

http://auriga.wearlab.de/~alb/msnlib/

MSN Messenger

pymsn

http://telepathy.freedesktop.org/wiki/Pymsn

MSN Messenger

msnp

http://msnp.sourceforge.net/

Network

Twisted

http://twistedmatrix.com/

Images

PIL

http://www.pythonware.com/products/pil/

Images

gdmodule

http://newcenturycomputers.net/projects/gdmodule.html

Images

VideoCapture

http://videocapture.sourceforge.net/

Sciences and Maths

scipy

http://www.scipy.org/

Sciences and Maths

NumPy

http://numpy.scipy.org//

Sciences and Maths

numarray

http://www.stsci.edu/resources/software_hardware/numarray

Sciences and Maths

matplotlib

http://matplotlib.sourceforge.net/

Games

Pygame

http://www.pygame.org/news.html

Games

Pyglet

http://www.pyglet.org/

Games

PySoy

http://www.pysoy.org/

Games

pyOpenGL

http://pyopengl.sourceforge.net/

Jabber

jabberpy

http://jabberpy.sourceforge.net/

Web

scrape

http://zesty.ca/python/scrape.html

Web

Beautiful Soup

http://crummy.com/software/BeautifulSoup

Web

pythonweb

http://www.pythonweb.org/

Web

mechanize

http://wwwsearch.sourceforge.net/mechanize/

Localisation

geoname.py

http://www.zindep.com/blog-zindep/Geoname-python/

Serial port

pySerial

http://pyserial.sourceforge.net/

Serial port

USPP

http://ibarona.googlepages.com/uspp

Parallel Port

pyParallel

http://pyserial.sourceforge.net/pyparallel.html

USB Port

pyUSB

http://bleyer.org/pyusb/

Windows

ctypes

http://starship.python.net/crew/theller/ctypes/

Windows

pywin32

http://sourceforge.net/projects/pywin32/

Windows

pywinauto

http://www.openqa.org/pywinauto/

Windows

pyrtf

http://pyrtf.sourceforge.net/

Windows

wmi

http://timgolden.me.uk/python/wmi.html

PDA/GSM/Mobiles

pymo

http://www.awaretek.com/pymo.html

PDA/GSM/Mobiles

pyS60

http://sourceforge.net/projects/pys60

Sound

pySoundic

http://pysonic.sourceforge.net/

Sound

pyMedia

http://pymedia.org/

Sound

FMOD

http://www.fmod.org/

Sound

pyMIDI

http://www.cs.unc.edu/Research/assist/developer.shtml

GMail

libgmail

http://libgmail.sourceforge.net/

Google

pyGoogle

http://pygoogle.sourceforge.net/

Expect

pyExpect

http://pexpect.sourceforge.net/

WordNet

pyWordNet

http://osteele.com/projects/pywordnet/

Command line

cmd

http://blog.doughellmann.com/2008/05/pymotw-cmd.html

Compiler backend

llvm-py

http://mdevan.nfshost.com/llvm-py/

3D

VPython

http://vpython.org