Mozaik - Mozaïk is a tool based on nodejs / react / d3 / stylus to easily craft beautiful dashboards.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Grafana - Data visualization & Monitoring with support for Graphite, InfluxDB, Prometheus, Elasticsearch and many more databases
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.
freeboard - An open source real-time dashboard builder for IOT and other web mashups.
Prometheus - An open-source systems monitoring and alerting toolkit.