SQLite was the topic at the last ONETUG meeting here in Orlando, FL. I was surprised to find that SQLite was exactly what I was looking for in a client-side database – slim and easy to deploy. There’s also an open-source project for an ADO.NET data provider where they provide everything you need to use SQLite inside your .NET application. I was able to modify one of my applications to use it in less than thirty minutes and found both the database and ADO.NET provider to be extremely easy to use, and fast!