VistaDB

VistaDB is a fully managed and typesafe embedded SQL database engine developed in C# for .NET, Compact Framework and Mono. Small 600KB footprint, ASP.NET and WinForms support for building desktop, mobile and server apps, SQL Server 2005 compatible data types and T-SQL syntax, Unicode support, Blowfish encryption, Visual Studio 2005 integration, ZeroClick deployment, free distrubution, visual Data Builder tool and Data Migration Wizard, and more.