DbEntry.Net (Leafing Framework) is a lightweight, high performance ORM compnent for .Net. It provides MVC, IoC framework as well.

Continuation of the DBLinq project, which allows for Linq as well as DBML file generation using non-MS databases, such as MySQL, PostgreSQL, Oracle, Ingres, SQLite, FireBird, and SQL Server

A collection of cross vendor database interface classes for .NET written in C# providing a consistent and simplified way of accessing SQL Server, SQL Server CE,Oracle,Access,Access 2007,MySql,DB2,Visual FoxPro,dBASE,Paradox,Pervasive,Firebird,VistaDB and Postgresql databases.

An Enterprise Application Framework for .Net that produces an agile application from the data layer through to the front-end. Free open source under the LGPL license, it includes ORM and UI generation to create one application for the desktop & web.

D.E.M.O.N SQL Database Installer is an Un-SQL(SQL means boring here) Database server installer for many types of Database :MySQL, FireBird, SQLite and others.