Wazuh - Open Source Host and Endpoint Security
Rapid7 MetaSploit - Penetration testing solution for risk validation.
Beats - Beats is the platform for single-purpose data shippers that is installed as lightweight agents and send data to machines to Logstash or Elasticsearch.
Nessus - Nessus Professional is a security platform designed for businesses who want to protect the security of themselves, their clients, and their customers.
rsyslog - Rsyslog is an enhanced syslogd supporting, among others, MySQL, PostgreSQL, failover log...
Intruder - Intruder is a security monitoring platform for internet-facing systems.