sure | Python Package Wiki

Based on how often these packages appear together in public requirements.txt files on GitHub.

lettuce	Behaviour Driven Development for python
extras	Useful extra bits for Python - things that shold be in the standard library
WebTest	Helper to test WSGI applications
pygments-markdown-lexer	Pygments Markdown Lexer – A Markdown lexer for Pygments to highlight Markdown code snippets.
testfixtures	A collection of helpers and mock objects for unit tests and doc tests.
ansi	ANSI cursor movement and graphics
unittest2	The new features in unittest backported to Python 2.4+.
WSGIProxy	HTTP proxying tools for WSGI apps
pytidylib	Python wrapper for HTML Tidy (tidylib) on Python 2 and 3
fuzzywuzzy	Fuzzy string matching in python
nose-selecttests	Specify whitelist of keywords for tests to be run by nose
nine	Python 2 / 3 compatibility, like six, but favouring Python 3
nose-cover3	Coverage 3.x support for Nose
nose-progressive	A testrunner with a progress bar and smarter tracebacks
zope.lifecycleevent	Object life-cycle events
LEPL	A Parser Library for Python 2.6+/3+: Recursive Descent; Full Backtracking
cogapp	Cog: A content generator for executing Python snippets in source files.
parse	parse() is the opposite of format()
hypchat	Package for HipChat's v2 API

Proportion of downloaded versions in the last 3 months (only versions over 1%).

pip install sure==2.0.0