Django | The Web framework for perfectionists with deadlines: This framework has been around for a while, so maybe Rails is “Django for Ruby”?
Developed and used over the past two years by a fast-moving online-news operation, Django was designed from scratch to handle two challenges: the intensive deadlines of a newsroom and the stringent requirements of experienced Web developers. It has convenient niceties for developing content-management systems, but it’s an excellent tool for building any Web site.
The admin interfaces are gorgeously clean. See this page for some examples.