mock : A Python Mocking and Patching Library for Testing
ZeroDB : ZeroDB enables clients to run queries over encrypted databases without exposing decrypted data to the server and without a proxy gateway.
docopt : Command-line interface description language. docopt helps you define interface for your command-line app, and automatically generate parser for it.
Bridgy : Bridgy pulls comments, likes, and reshares on social networks back to your web site. You can also use it to post to social networks - or comment, like...
pyo : pyo is a Python module written in C to help digital signal processing script creation.
sh (previously pbs) is a full-fledged subprocess interface for Python that allows you to call any program as if it were a function