Download SQL Server 2005 Service Pack 1
Microsoft has released Service Pack 1 for the SQL Server 2005. The MS SQL Server 2005 Service Pack 1 (SP1) has been announced on 18th of April.
You can download SQL Server 2005 Service Pack 1 for Enterprise, Developer, Standart and Workgroup editions from Microsoft Downloads.
The file size for x86 edition is about 250 MB where on the other hand the size is 350 MB for ia64 edition.
You can view the ReadMe file for the SQL Server Service Pack 1 at ReadmeSQL2005SP1.htm
If you are looking for the Service Pack for SQL Server 2005 Express Edition you will find the download link at SQLExpress.
Before installation of the SP1 read the readme file for Express Edition at ReadmeSQLEXP2005.htm
If you are looking for a more enhanced version of the SQL Server Express Edition, you can try the Microsoft SQL Server 2005 Express Edition with Advanced Services.
This product has an easy-to-use graphical user interface SQL Server 2005 Management Studio Express (SSMSE).
Also you can benefit from MS SQL Reporting Services for reporting issues.
The download page for SQL Server Express Edition with Advanced Services is SQL Express Advanced
You can find more detailed information about the installation issues of Express Edition with Advanced Services at ReadmeSQLEXP2005Advanced.htm
The final version numbers for the all MS SQL Server 2005 SP1 products is 9.00.2047
There are also tools available to use with SP1, one is Feature Pack for Microsoft SQL Server 2005 - April 2006, which includes a number of tools like Microsoft ADOMD.NET, Microsoft OLEDB Provider for DB2, Microsoft SQL Server Management Pack for MOM 2005, Microsoft SQL Server 2000 DTS Designer Components, Microsoft SQL Server 2005 Analysis Services 9.0 OLE DB Provider, Microsoft SQL Server 2005 Mobile Edition, Microsoft SQL Server 2005 Upgrade Advisor.
For all the list of available tools within Feature Pack April 2006 go to Feature Pack