Django-extended-generic-views is a project mainly written in Python, it's free.
Django Extended Generic views
Extended Class Based View provides you with a more extensible set of generic class based views. They can be used to start prototyping up to more complex design patterns.
Their main goals in to ease the developer's pain and help him going faster.
http://readthedocs.org/docs/extended-class-based-views/en/latest/index.html