I'm not sure about the other frameworks listed but I did notice the following related to Django:

- Django's caching supports ram, disk, database, and memcache as well. - Migrations are supported in Django via the 3rd party django_evolution to name one of a few. - Django trunk also has simplejson included. - For documentation there are the online docs, the djangobook.com website, three published books as of today, and at least a few other books coming out in the next few months. My point just being that there is more then just one book.