docopt : Command-line interface description language. docopt helps you define interface for your command-line app, and automatically generate parser for it.
cliff : Command Line Interface Formulation Framework. cliff is a framework for building command line programs. It uses plugins to define sub-commands, output ...
notifiers : A Python one stop shop for all notification providers with a unified and simple interface.
Essentia : Open-source library and tools for audio and music analysis, description and synthesis
Cliquet : Cliquet is a toolkit to ease the implementation of HTTP microservices, such as data-driven REST APIs.
Clint is a python module filled with a set of awesome tools for developing commandline applications.