Hi, you can download and install Microsoft SQL Management Studio Express for free.
If you have purchased any edition of SQL Server you can use the SQL Server CD/DVD that you purchased to install the full client tools on your workstation. Simply put in the CD/DVD and run through the installer. When you get to the screen with the list of services selectt the client tools.
The Management tools from the paid for version has more features than the free one.
There is no license cost to install the management tools on your workstation.