Thanks to Chris Cemper for pointing out this list of top network security tools. The top 75 tools, compiled after surveying Nmap users, have little Linux/BSD/Windows and dollar sign icons, describing operating system compatibility and licensing terms.

Armor2net Personal Firewall, a program for the Windows operating system that helps protect computers from the threats on the Internet and World Wide Web. With Armor2net Personal Firewall in place, end-users can breathe a sigh of relief.