Check security

["Gare" <gare () wanadoo es>]

I what know if there is any software to test the security of a web app, some
app that can throw attacks to my web application as if it were a hacker.
I know, and use, rats to scan the code of my php scripts, but I would like
to find a soft that can perform a test in running conditions, before I put
my app in my production server.

Any idea?