Sql Server Management Studio Express for Sql Express - November, 2005 CTP
http://www.microsoft.com/downloads/details.aspx?FamilyId=82AFBD59-57A4-455E-A2D6-1D4C98D40F6E&displaylang=en
From the download page:
Overview
Microsoft SQL Server Management Studio Express (SSMSE) provides a graphical management tool for SQL Server 2005 Express Edition (SQL Server Express) instances. SSMSE can also manage relational engine instances created by any edition of SQL Server 2005. SSMSE cannot manage Analysis Services, Integration Services, SQL Server 2005 Mobile Edition, Notification Services, Reporting Services, or SQL Server Agent.
Microsoft SQL Server Management Studio Express - Community Technical Preview November 2005 is unsupported pre-release software.