docopt : Command-line interface description language. docopt helps you define interface for your command-line app, and automatically generate parser for it.
Clint : Clint is a python module filled with a set of awesome tools for developing commandline applications.
readability-lxml : In few words, Given a html document, it pulls out the main body text and cleans it up. It also can clean up title based on latest readability.js code.
mock : A Python Mocking and Patching Library for Testing
notifiers : A Python one stop shop for all notification providers with a unified and simple interface.
Command Line Interface Formulation Framework. cliff is a framework for building command line programs. It uses plugins to define sub-commands, output formatters, and other extensions.