logstash - logstash is a tool for managing events and logs.
Fluentd - Fluentd is a cross platform open source data collection solution originally developed at Treasure Data.
log.io - Real-time log monitoring in your browser
Wazuh - Open Source Host and Endpoint Security
Fortinet FortiAnalyzer - Fortinet FortiAnalyzer is a powerful product for Security Fabric Analytics and Automation.
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.