Wazuh - Open Source Host and Endpoint Security

logstash - logstash is a tool for managing events and logs.

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.

Gravwell - Gravwell is an all-you-can-ingest data fusion analytics platform that enables complete context and root cause analytics for security and business data.

Syslog-ng - Syslog-ng decreases the quantity and improves the quality of data, thus enhancing the capacities of your SIEM solution.

Splunk - Splunk's operational intelligence platform helps unearth intelligent insights from machine data.