Microsoft SQL Server Tools

SQL Server Migration Assistant:
http://www.microsoft.com/sql/solutions/migration/default.mspx

SQL Server 2005 Best Practices Analyzer 
http://www.microsoft.com/downloads/details.aspx?FamilyId=DA0531E4-E94C-4991-82FA-F0E3FBD05E63&displaylang=en

Microsoft Baseline Security Analyzer 2.1
http://technet.microsoft.com/en-us/security/cc184923.aspx