Microsoft SQL Browser Client [closed]
Try HeidiSQL http://www.heidisql.com/ - it's open source and does both MSSQL and MySQL. It is very well featured.
(just a note as of Aug 2013 the author is working on MS Azure MSSQL access but it's not working yet)
A lightweight alternative - which also allows browisng of other databases - is SqlDbx. The Personal Edition is free.