Nmap
Description: Nmap is an open source network discovery and security auditing tool. It is used to discover hosts and services on a network and to detect potential vulnerabilities.
Type: software
Pricing: Free
OpenVAS
Description: OpenVAS is an open source vulnerability scanner and vulnerability management solution. It can scan networks and systems for known vulnerabilities and misconfigurations and provide detailed reports.
Type: software
Pricing: Open Source