MinimalModbus is an easy-to-use Python module for talking to instruments (slaves) from a computer (master) using the Modbus protocol. Example code includes drivers for Eurotherm and Omega process controllers. The only dependency is the pySerial module. This software supports the ‘Modbus RTU’ serial communication version of the protocol, and is intended for use on Linux, OS X, and Windows platforms. It has been tested with Python2.6, Python2.7, and Python3.2.
IPy is a Python class and tools for handling IPv4 and IPv6 addresses and networks. The IP class provides comfortable parsing and handling for most notations in use for IPv4 and IPv6 addresses and networks. It was greatly inspired by the interface of the RIPE Perl module NET::IP, but it doesn't share the implementation. It doesn't share non-CIDR netmasks, so funky stuff like a netmask of 0xffffff0f can't be done here.
python-jabberbot is a Jabber bot framework for Python that makes it easy to write simple Jabber bots. One can use these Jabber bots to provide information about running systems, to make Web sites interact with Jabber-enabled visitors, or notify the bot owner about updates or changes that are monitored with custom Python scripts.
LightBlue is a cross-platform Python Bluetooth API for Mac OS X, GNU/Linux, and Python For Series 60. It provides easy programmatic access to device and service discovery, RFCOMM sockets, L2CAP client sockets, sending and receiving files over OBEX, service advertising, and local device information.
pyraknet is a Python extension that has bindings for the reliable UDP network library RakNet. pyraknet allows you to concentrate on your game or application rather then writing a your own networking code. It is straightforward to implement and you only need a small amount of TCP/IP networking knowledge.