The Z Object Database, or the ZODB for short, is a powerful and easy-to-use object persistence system for Python. [Open Source, ZPL]

SQL toolkit and Object Relational Mapper that gives application developers the full power and flexibility of SQL. [Open Source, MIT license]

An Object Relational Manager for providing an object interface to your database, with tables as classes, rows as instances, and columns as attributes. [Open Source, LGPL]

On-disk B+Tree Based Database Kit. [Open Source]

A lower-level API for the Metakit C++ core extension, and uses SCXX by Gordon McMillan as C++ glue interface. [X/MIT-style and commercial licenses]

Python bindings for BerkeleyDB 3.x embeddable database. [Open Source, BSD-like]

APSW is a thin wrapper over the SQLite 3 API. [Open Source, zlib/libpng license]

A Python interface to MetaKit. MetaKit is an embeddable database which runs on Unix, Windows, Macintosh, and other platforms. [Open-Source, MIT]

A simple and consistent programming interface to SQL databases, in Python. [Open source, Python Software Foundation License]

Python Database Objects provides a convenient Object Oriented API for database access in Python. PDO supports multiple RDBMS with the same API, and provides features not found in the DB-API spec, such as column access by name. [OPen source, BSD style ...