Microsoft Corporation - (Free)
SQL Server Express is the solution offered by Microsoft for the development of Windows and Web applications using SQL Server.
SQL Server Express is a popular software that facilitates the development of Windows and Web applications using SQL Server.Designed to integrate with Visual Studio Express, SQL Server Express Edition enables developers, amateurs or students to have a complete environment to create applications using databases data.
Novices will appreciate the presence of a substantial literature (in English) and "starter kits" designed not from scratch.This software allows a simplified administration by tunning automatically the database for optimal performance. It also allows easily moving or copying the SQL Server Express databases to another computer or hosted server using XCopy and ClickOnce deployment.