1. Nmahp :
A port scanning tool. Used for network scanning and security auditing.
2. Masscan :
A super fast tool for scanning a large range of IP addresses within a matter of minutes
3. Nikto :
Great for finding web server vulnerabilities
4. Nessus :
The defacto all round tool for finding mostly network based vulnerabilities
5. Metasploit :
6. Tcpdump :
-A versatile packet analyzer which runs under the command line. It permits the user to display TCP/IP and other packets being transmitted or received over a network to which the computer is attached.
7. Httptunnel :
A tunneling software that can tunnel network connections through restrictive HTTP proxies over pure HTTP “GET” and “POST” requests.
8. Proxytunnel :
This is program to stealthily tunnel a connection through a standard HTTPS proxy.
9. Ettercap :
For capturing and redirecting traffic on a network. Perfect for man-in-the-middle attacks.