Splunk - Splunk's operational intelligence platform helps unearth intelligent insights from machine data.
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.
Kibana - Easily visualize data pushed into Elasticsearch from Logstash, es-hadoop or 3rd party technologies...
Graylog - Graylog is an open source log management platform for collecting, indexing, and analyzing both structured and unstructured data.
logstash - logstash is a tool for managing events and logs.
ThreatDefence - ThreatDefence is a managed threat detection and response platform that can detect and respond to attacks from brute-force attacks to automated tools to social engineering and email phishing.