[From Softpedia]
Microsoft is offering two releases of its database platform as free downloads. Both SQL Server 2008 Express and SQL Server 2008 Express with Tools went live on the Microsoft Download Center in February 2009 and are now up for grabs at no charge. According to the software giant, the Express edition of SQL Server 2008 is designed to act as part of the infrastructure necessary to build small desktop and server applications, and for redistribution packages from ISVs. The company is offering a total of three downloads, tailored to different infrastructures including 32-bit and 64-bit flavors.
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