Apache Archiva - Apache Archiva is an extensible repository management software.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Apache Tika - Apache Tika toolkit detects and extracts metadata and text from different file types.
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.
Apache Ambari - Ambari is aimed at making Hadoop management simpler by developing software for provisioning, managing, and monitoring Hadoop clusters.
Prometheus - An open-source systems monitoring and alerting toolkit.