PyVows is an asynchronous behaviour driven development (BDD) for Python. The main reason for asynchronous testing is to make tests which target I/O run much faster, by running them concurrently. By having a faster suite, it gets run that more often, thus improving the feedback cycle.
Ivoire is a simple BDD testing framework for Python. It is an RSpec-like testing framework. It aims to bring a few minor constructs over to Python in a way that isn't overwhelmingly disruptive or counterculture.
Appium is an open source test automation tool for use with native and hybrid mobile apps. It drives iOS and Android apps using the WebDriver JSON wire protocol. Appium aims to automate any mobile app from any language and any test framework, with full access to back-end APIs and DBs from test code.