Python Social Auth is an easy to setup social authentication/registration mechanism with support for several frameworks and auth providers.
Crafted using base code from django-social-auth, implements a common interface to define new authentication providers from third parties. And to bring support for more frameworks and ORMs.
The lib supports a few frameworks at the moment with Django, Flask, Pyramid, Webpy and Tornado and more to come. The frameworks API should ease the implementation to increase the number of frameworks supported.
There are multiple ORM python libraries around, some frameworks has their own built-in version too. python-social-auth tries to support the different interfaces available, at the moment SQLAlchemy, Django ORM and Mongoengine are supported, but with the Storage API it should be easy to add more support.