Wazuh - Open Source Host and Endpoint Security
Fluentd - Fluentd is a cross platform open source data collection solution originally developed at Treasure Data.
Fortinet FortiAnalyzer - Fortinet FortiAnalyzer is a powerful product for Security Fabric Analytics and Automation.
Riemann - Container Monitoring
Syslog-ng - Syslog-ng decreases the quantity and improves the quality of data, thus enhancing the capacities of your SIEM solution.
logstash - logstash is a tool for managing events and logs.