Microsoft SQL Server Express Edition

Microsoft Product Page:  http://www.microsoft.com/express/Database/

• Available free for both development and deployment.
• Available with a graphical management tool, reporting capabilities, full-text search, and spatial support.
• Ideal for building Web sites and apps, small scale LOB solutions or for redistribution with ISV applications.

Custom Installation Instructions: http://www.microsoft.com/express/support/SQLServerExpress.aspx

Supported Operating Systems

• Windows^® Server 2003 Service Pack 2
• Windows^® Server 2008
• Windows^® Vista
• Windows^® Server 2008 R2
• Windows^® 7
• Windows^® Vista Service Pack 1
• Windows^® XP Service Pack 2
• Windows^® XP Service Pack 3

Physical Limitations

• 32-Bit Systems: Computer with Intel or compatible 1GHz or faster processor (2 GHz or faster is recommended. Only a single processor is supported.)
• 64-Bit systems: Computer with Intel or compatible 1.4 GHz or higher processor (2 GHz or faster is recommended. Only a single processor is supported.)
• Minimum of 512 MB of RAM (1 GB or more is recommended)
• 1.9GB of free hard disk space

Download Links:

1. SQL Server 2008 R2 Express x64bit with Database Only
2. SQL Server 2008 R2 Express x64bit with Database with Management Tools
3. SQL Server 2008 R2 Express x86bit with Database Only
4. SQL Server 2008 R2 Express x86bit with Database with Management Tools
5. MS SQL Express downloads page: https://www.microsoft.com/betaexperience/pd/SQLEXPPRE/enus/