Persistence

1. Relational

1.1. SQL Server

1.2. Oracle

1.3. MySQL

1.4. SQL Lite

2. NoSQL

2.1. RavenDB

2.2. Mongo

3. Frameworks

3.1. ADO.Net Entity Framework

3.2. NHibernate

3.2.1. Fluent NHibernate

3.3. ADO.Net

3.4. Data Access Application Block

3.5. Simple.Data