20+ best FREE security tools

We asked information and network security pros to name the best free software tools for their daily work. Here are 21 standouts to improve your defenses - without breaking the bank.
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Your favorite infosec freebies

Who doesn't love free software?

Recently, we conducted an informal, unscientific poll asking readers to tell us about their favorite free information security tools. And boy, did they ever respond.

Here are more than 20 of the most popular answers. Some (Nessus, Nmap, Metasploit) will be very familiar; others may surprise you.

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