A sequel to itertools: http://pypi.python.org/pypi/more-itertools/ (The upcoming 2.1 will include all the routines from the "recipes" section of the docs as well.)
A front end for the popular Nose test runner that shows a progress bar and tracebacks during tests (via blessings, of course): http://pypi.python.org/pypi/nose-progressive/
A shim for using Nose with Django (and making your tests go 4x as fast): http://pypi.python.org/pypi/django-nose/
While on the subject of Django, here's a little shim to let you write lightweight management subcommands (and generate commands at runtime, if you want to go crazy): http://pypi.python.org/pypi/django-subcommander/