Which tool would be useful for gathering information like names, emails, IPs, and URLs?

The tool that stands out for gathering information such as names, emails, IPs, and URLs is theHarvester. This tool is specifically designed for reconnaissance tasks, making it particularly effective in the initial stages of penetration testing. TheHarvester collects data from various public sources and search engines, which allows penetration testers to compile a list of potential targets along with their relevant details like email addresses and hostnames.

While other tools have their own specific use cases, they do not focus on this type of data collection. Aircrack-ng is primarily used for assessing the security of Wi-Fi networks, particularly for cracking WEP and WPA/WPA2 encryption keys. Nmap is a versatile network scanner that excels at discovering hosts and services on a network but is not specifically aimed at gathering publicly available contact information. InSSIDer is a tool used for Wi-Fi network analysis and does not provide the type of information that theHarvester focuses on.

Thus, for gathering names, emails, IPs, and URLs, theHarvester is the most appropriate and effective choice.