The most common tools to do penetration testing is available for everyone to download. The hacking tools themselves are not evil nor good, but the person using the tools makes them either instrument harm or for protection. Snort is a free and open source Network Intrusion Prevention System (PIN) and network intrusion detection (NIDS) Snort can be combined with other software types such as SnortSnarf, Sguil, OSSIM, and the Basic and Security Engine Analysis (BASE) to provide a visual representation of intruder data.”]
Source: https://hackercombat.com/8-classic-hacking-tools-a-budding-hacker-can-use-today/