docopt
Pythonic command line arguments parser, that will make you smile.
Project Source: https://github.com/docopt/docopt
Project Homepage: http://docopt.org/

click
click is a package for creating beautiful command line interfaces in a composable way with as little amount of code as necessary.
Project Source: https://github.com/mitsuhiko/click
Project Homepage: http://click.pocoo.org/

clint
Clint is a module filled with a set of awesome tools for developing command line applications.
Project Source: https://github.com/kennethreitz/clint
Project Homepage: https://pypi.python.org/pypi/clint/

cookiecutter
A command-line utility that creates projects from cookiecutters (project templates).
Project Source: https://github.com/audreyr/cookiecutter
Project Documentation: http://cookiecutter.readthedocs.org/en/latest/

glacier-cli
Command-line interface to Amazon Glacier.
Project Source: https://github.com/basak/glacier-cli

glue
Glue is a simple command line tool to generate sprites.
Project Source: https://github.com/jorgebastida/glue
Project Documentation: http://glue.readthedocs.org/en/latest/

httpie
HTTPie is a command line HTTP client. Its goal is to make CLI interaction with web services as human-friendly as possible.
Project Source: https://github.com/jakubroztocil/httpie

webkit2png
webkit2png is a command line tool that creates screenshots of webpages.
Project Source: https://github.com/paulhammond/webkit2png
Project Homepage: http://www.paulhammond.org/webkit2png/