web2py/pydal: A pure Python Database Abstraction Layer
A fairly neat-looking DAL/ORM for Python.
sqlitedict
A kind of NoSQL wrapper for sqlite in Python; store Python dictionary objects in a sqlite database.
dataset 1.6.2 documentation
Python database wrapper for the lazy developer. The main selling point being:
dataset provides a simple abstraction layer that removes most direct SQL statements without the necessity for a full ORM model - essentially, databases can be used like a JSON file or NoSQL store.
PonyORM - Python ORM with beautiful query syntax
A Python ORM that seems to aim to be very Pythonic in its approach.