Entity Framework - See Comparison of Entity Framework vs NHibernate.
Hibernate ORM - Hibernate team account. Hibernate is a suite of open source projects around domain models. The flagship project is Hibernate ORM, the Object Relational Mapper.
Entity Developer - Entity Developer is a powerful ORM designer for ADO.
Eloquent ORM - [READ ONLY] Subtree split of the Illuminate Database component (see laravel/framework) - illuminate/database
SQLAlchemy - SQLAlchemy is the Python SQL toolkit and Object Relational Mapper that gives application developers the full power and flexibility of SQL.
RedBeanPHP - Backend Development, Databases, and ORMs