Django : How can I find a list of models that the ORM knows?

Simple solution:

import django.apps
django.apps.apps.get_models()

By default apps.get_models() don’t include

• auto-created models for many-to-many relations without
  an explicit intermediate table
• models that have been swapped out.

If you want to include these as well,

django.apps.apps.get_models(include_auto_created=True, include_swapped=True)

Prior to Django 1.7, instead use:

from django.db import models
models.get_models(include_auto_created=True)

The include_auto_created parameter ensures that through tables implicitly created by ManyToManyFields will be retrieved as well.