XMLSec: XML security library (Remote)

This is an encryption library available to people implementing xml documents.

Microsoft IIS Lockdown tool (Remote)

This tool will harden the security of a machine running IIS to prevent attackers from easily exploiting you.

Nikto CGI Scanner (Local Copy)(Nikto plugin's)

A very complete cgi scanner that checks for thousands of known web application holes. You can see the output against this site here.