Django-class-fixtures is a pure Python, class-based alternative to Django’s traditional JSON/XML-serialized fixtures. It allows you to do some cool dynamic stuff that you wouldn’t be able to do with old-style fixtures.
It’s got a comprehensive test suite and is very well documented using Sphinx (readable at Read the Docs). I’ve been using it in my personal projects for a while now without problems.
It’s in a pre-0.9 state and has no “official public release” through PyPi yet, but the code is available at GitHub. I hope to work on it more to get it into a 1.0 state one of these days. Check it out and leave feedback!