I just stumbled upon yolk.
It does a bunch of things related to package management, but the simplest and arguably most useful is to just list installed packages.
marcabramowitz@Marc-Abramowitzs-MacBook-Pro:~$ yolk -l Django - 1.3 - active development (/usr/local/lib/python2.7/site-packages) Python - 2.7.1 - active development (/usr/local/Cellar/python/2.7.1/lib/python2.7/lib-dynload) distribute - 0.6.16 - active development (/usr/local/lib/python2.7/site-packages) ipython - 0.10.2 - active development (/usr/local/lib/python2.7/site-packages) meld3 - 0.6.7 - active development (/usr/local/lib/python2.7/site-packages) mercurial - 1.8.2 - active development (/usr/local/lib/python2.7/site-packages) pip - 1.0.1 - active development (/usr/local/lib/python2.7/site-packages) pyodbc - 2.1.8 - active development (/usr/local/lib/python2.7/site-packages) setuptools - 0.6c11 - active development (/usr/local/lib/python2.7/site-packages) supervisor - 3.0a10 - active development (/usr/local/lib/python2.7/site-packages) virtualenv - 1.6 - active development (/usr/local/lib/python2.7/site-packages) virtualenvwrapper - 2.7.1 - active development (/usr/local/lib/python2.7/site-packages) wsgiref - 0.1.2 - active development (/usr/local/Cellar/python/2.7.1/lib/python2.7) yolk - 0.4.1 - active development (/usr/local/lib/python2.7/site-packages)
Although now that I think about it, you could get almost the same info from pip:
marcabramowitz@Marc-Abramowitzs-MacBook-Pro:~$ pip freeze Django==1.3 distribute==0.6.15 ipython==0.10.2 meld3==0.6.7 mercurial==1.8.2 pyodbc==2.1.8 supervisor==3.0a10 virtualenv==1.6 virtualenvwrapper==2.7.1 wsgiref==0.1.2 yolk==0.4.1
though yolk can do some other nice things like display dependencies:
marcabramowitz@Marc-Abramowitzs-MacBook-Pro:~$ yolk -d supervisor supervisor 3.0a10 meld3>=0.6.5
and entry points:
marcabramowitz@Marc-Abramowitzs-MacBook-Pro:~$ yolk --entry-points paste.paster_create_template paste.deploy.paster_templates paste_deploy = paste.deploy.paster_templates:PasteDeploy paste.script.templates basic_package = paste.script.templates:BasicPackage pylons.util pylons_minimal = pylons.util:MinimalPylonsTemplate pylons.util pylons = pylons.util:PylonsTemplate
and querying for the latest goodies on pypi:
(yolk)marcabramowitz@Marc-Abramowitzs-MacBook-Pro:~/python/virtualenvs/yolk$ yolk --latest-releases=4 django-dynamic-choices 0.1.6 pydub 0.4.2 collective.portlet.calendar 0.5 sslsnoop 0.7.1 TexDO 0.1.1 haystack 0.7 thumbor 0.7.12 webapp2 1.2 django-thumbnail-works 0.2.1 Beacon 1.3-alpha