Database mapping layer for MongoDB on Python. Includes schema enforcement and some facilities for schema migration.
YB.ORM is a tool for object-relational mapping (ORM) for C++. Inspired by things like Hibernate or SQLAlchemy. Should be database-independent. Includes a tool for code generation of Domain objects. Tables' metadata description is an XML file.
Nvergent is a light weight extension library for NHibernate 3.2 or >. It provides a entity constructor DI extension point, DataAnnotations integration at the persistence layer, and an integrated web request profiler.
Free open source PHP5 framework for small to midsized projects. Supports abstraction for MySQL, SQLite, PostgreSQL, and MsSQL database servers including in conjunction with the O/R mapping automatic schema synchronization.
ogiga | Hydrail is an Object-Relational-Mapping for PHP 5.x