Read about ExpressProfiler in the Wiki.
Ranked in these QuestionsQuestion Ranking
Pro Open source
Much easier than Microsoft's profiler, which is not included in the Express version of SQL Server.
Pro Works with most SQL Server versions
Can be used with both Express and non-Express editions of SQL Server 2005/2008/2008r2/2012/2014 (including LocalDB).
Pro No installation needed
Can be used without installation.