Ming is a Python toolkit that provides schema enforcement, an object/document mapper, an in-memory database, and other features to accelerate MongoDB development. It was created at SourceForge as part of the site's rewrite from PHP/Postgres to Python/MongoDB. Ming aims to address the lack of structure in MongoDB by providing a thin layer on top of PyMongo that ensures data integrity, validates data, and provides a unit of work for managing changes. The toolkit consists of multiple components, including schema enforcement, an object/document mapper, and an in-memory database. Ming's architecture is based on SQLAlchemy and allows developers to define schemas using imperative or declarative syntax. It also supports testing with an implementation of the pymongo API called MongoDB-in-Memory. Overall, Ming aims to simplify MongoDB development by providing a structured approach to working with dynamic documents.