I (Fyodor) asked users from the nmap-hackers mailing list to share their favorite tools, and 3,243 people responded. This allowed me to expand the list to 100 tools, and even subdivide them into categories. Anyone in the security field would be well advised to go over the list and investigate tools they are unfamiliar with. I discovered several powerful new tools this way.

Top 100 Network Security Tools

] The Supreme Court has always held that what is reasonable
] depends on context. If you're in a situation where people
] are being killed and you're trying to save lives, you can
] be more intrusive...Protecting the state is a higher
] duty. To say otherwise is to sacrifice the ends to the
] means. If you're unwilling in times of crisis to depart
] from the law, and you lose your freedom, you've done no
] service to anyone.

Perspective: The first 'e-war'