Apache Camel - Apache Camel is a versatile open-source integration framework based on known enterprise integration patterns.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Apache Kafka - Apache Kafka is an open-source message broker project developed by the Apache Software Foundation written in Scala.
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.
elastic.io - elastic.io connects your SaaS to other cloud apps in seconds.
Prometheus - An open-source systems monitoring and alerting toolkit.