django-taggit a simpler approach to tagging with Django. Add "taggit" to your INSTALLED_APPS then just add a TaggableManager to your model and go:

from django.db import models

from taggit.managers import TaggableManager

class Food(models.Model):
    # ... fields here

    tags = TaggableManager()

Then you can use the API like so:

>>> apple = Food.objects.create(name="apple")
>>> apple.tags.add("red", "green", "delicious")
>>> apple.tags.all()
[<Tag: red>, <Tag: green>, <Tag: delicious>]
>>> apple.tags.remove("green")
>>> apple.tags.all()
[<Tag: red>, <Tag: delicious>]
>>> Food.objects.filter(tags__name__in=["red"])
[<Food: apple>, <Food: cherry>]

Tags will show up for you automatically in forms and the admin.

django-taggit requires Django 1.3 or greater.

For more info checkout out the documentation. And for questions about usage or development you can contact the mailinglist.