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Anybody have a good list for python?

For Django-based apps - you should definitely take a look at Pinax http://pinaxproject.com/

Satchmo has some interesting approaches to solving certain problems in Django (like allowing to override general site settings in admin) - http://www.satchmoproject.com/

For examples of more lightweight WSGI apps using Werkzeug:

Zine (blogging engine) - http://zine.pocoo.org/

Solace (forum similar to StackOverflow) - http://opensource.plurk.com/Solace/

Another canonical example is Everyblock: http://code.google.com/p/ebcode/

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