LLBLGen Pro

It is a solution for fast and easy Entity Modeling and creates an entity model layer. It is a framework that works well with most existing ORMs, such as Entity Framework, NHibernate, Linq To SQL, or even your custom ORMs. You can design the database modeling layer and map it to your database. From now on, you only need to write queries. LLBLGen maps object easily in the relational model. It is widely used in many commercial projects around the world.