Nmap: Nmap (Network Mapper) is an open source security scanner used for network exploration and security auditing. It can be used to scan ports, detect operating systems, and even detect security vulnerabilities.
Wireshark: Wireshark is a free and open source packet analyzer used for network troubleshooting and analysis. It can be used to capture and analyze network traffic in order to detect malicious activity.
Metasploit: Metasploit is an open source framework used for developing and executing exploit code against a remote target machine. It can be used to gain access to systems and perform various other tasks.
Aircrack-ng: Aircrack-ng is a suite of tools used for wireless network security auditing. It can be used to crack WEP and WPA-PSK keys, as well as monitor and analyze wireless networks.
John the Ripper: John the Ripper is a free and open source password cracking tool used to detect weak passwords. It can be used to crack various types of passwords, including those used for system and application logins.
Burp Suite: Burp Suite is an integrated platform used for web application security testing. It can be used to detect and exploit vulnerabilities in web applications.
SQLMap: SQLMap is an open source tool used for detecting and exploiting SQL injection vulnerabilities. It can be used to gain access to databases and perform various other tasks.
Nessus: Nessus is a vulnerability scanner used for identifying and assessing the security of computer systems. It can be used to detect and exploit vulnerabilities in systems and applications.
Ophcrack: Ophcrack is a free and open source password cracking tool used to recover lost or forgotten passwords. It can be used to crack Windows passwords.
Maltego: Maltego is a digital forensics and intelligence tool used for gathering and analyzing information about a target. It can be used to identify relationships between people, organizations, and other entities.
Social Engineering Toolkit (SET): SET is an open source toolkit used for social engineering attacks. It can be used to perform various types of attacks, such as phishing, credential harvesting, and more.
Netcat: Netcat is a network utility used for reading and writing data across networks. It can be used to transfer files, scan ports, and even create backdoors.
Kismet: Kismet is a wireless network detector used for detecting and tracking wireless networks. It can be used to detect and analyze wireless networks and their associated devices.
THC Hydra: THC Hydra is a password cracking tool used for brute-forcing passwords. It can be used to crack various types of passwords, including those used for system and application logins.
Ettercap: Ettercap is a network security tool used for man-in-the-middle attacks. It can be used to intercept network traffic and perform various other tasks.
NIKTO: NIKTO is an open source web server scanner used for detecting web server vulnerabilities. It can be used to detect and exploit vulnerabilities in web servers.
Cain & Abel: Cain & Abel is a password recovery tool used for recovering lost or forgotten passwords. It can be used to crack various types of passwords, including those used for system and application logins.
AirSnort: AirSnort is a wireless LAN (WLAN) tool used for decrypting WEP keys. It can be used to crack WEP keys and monitor wireless networks.
BackTrack: BackTrack is a Linux-based penetration testing distribution used for security auditing and penetration testing. It can be used to detect and exploit vulnerabilities in systems and applications.