Comment Re:mercury (Score 1) 250
As well as LoadRunner and WinRunner mentioned earlier; Mercury also has Topaz. My company uses Topaz extensively to test and monitor our Web apps.
Check out their Topaz site: http://www-heva.mercuryinteractive.com/products/to paz/
Check out their Topaz site: http://www-heva.mercuryinteractive.com/products/t