SecurityOnion - Security Onion is a free and open source Linux distribution for intrusion detection, enterprise security monitoring, and log management.

Qualys - Qualys helps your business automate the full spectrum of auditing, compliance and protection of your IT systems and web applications.

Zabbix - Track, record, alert and visualize performance and availability of IT resources

Nessus - Nessus Professional is a security platform designed for businesses who want to protect the security of themselves, their clients, and their customers.

Suricata - Suricata is a high performance Network IDS, IPS and Network Security Monitoring engine.

BreachLock - BreachLock is a versatile platform that provides scalable and smooth penetration testing services for vulnerabilities.