A large number of tools are used in cybersecurity both for the detection of vulnerabilities and for their exploitation. There are many commercial and open-source tools for any technology to support audit, so a pentester uses many of these tools throughout his workday.
The Kali Linux distribution is one of the best known and includes a wide suite of security analysis tools, among which we can find reconnaissance tools (OSINT) and port scanning (nmap, hping, ..), WiFi security tools, voip, web, vulnerability exploitation frameworks, forensic analysis, cracking or reverse engineering.
In addition to auditing tools, there are a significant number of technologies aimed at protection, monitoring and response to security incidents.