Top 100 network security tools

fyodor ask user from the nmap-hackers mailing list to share their favorite tools, and 3,243 people responded, it's top 100 network security tools 2006. On XFOCUS forum some newbie often ask: How can I learn security(hacking) technology ...Try all tools on the list, and think about it's theory.
And I'm glad to see the project of XFOCUS name X-Scan on the list, it's first time that Chinese security software on it. glacier do a good job ;)