python_koans
Python Koans is a port of "Ruby Koans" it is an interactive tutorial for learning Python by practicing TDD and making tests pass.
Project Source: https://github.com/gregmalcolm/python_koans
Online Demo Address: http://www.youtube.com/watch?v=e2WXgXEjbHY&list=PL5Up_u-XkWgNcunP_UrTJG_3EXgbK2BQJ&index=1

sqlmap
sqlmap is an open source penetration testing tool that automates the process of detecting and exploiting SQL injection flaws and taking over of database servers.
Project Source: https://github.com/sqlmapproject/sqlmap
Project Homepage: http://sqlmap.org/

speedtest-cli
Command line interface for testing internet bandwidth using speedtest.net.
Project Source: https://github.com/sivel/speedtest-cli

buildbot
Python-based continuous integration testing framework
Project Source: https://github.com/buildbot/buildbot
Project Homepage: http://buildbot.net/

locust
Locust is an easy-to-use, distributed, user load testing tool.
Project Source: https://github.com/locustio/locust
Project Homepage: http://locust.io/

nose
nose is nicer testing for python.
Project Source: https://github.com/nose-devs/nose
Project Documentation: https://nose.readthedocs.org/en/latest/

splinter
python test framework for web applications.
Project Source: https://github.com/cobrateam/splinter
Project Homepage: http://splinter.cobrateam.info/

sixpack
Sixpack is a language-agnostic a/b-testing framework.
Project Source: https://github.com/seatgeek/sixpack
Project Homepage: http://sixpack.seatgeek.com/

owtf
OWASP Offensive Web Testing Framework is a project focused on penetration testing efficiency and alignment of security tests to security standards like: The OWASP Testing Guide (v3 and v4), the OWASP Top 10, PTES and NIST.
Project Source: https://github.com/owtf/owtf
Project Homepage: https://www.owasp.org/index.php/OWASP_OWTF