Zabbix - Track, record, alert and visualize performance and availability of IT resources
Google Tag Manager - Google Tag Manager helps make tag management simple, easy and reliable by allowing marketers and webmasters to deploy website tags all in one place.
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.
Piwik PRO Marketing Suite - Piwik PRO is a marketing suite dedicated to enterprise clients.
Prometheus - An open-source systems monitoring and alerting toolkit.
Tealium iQ Tag Management - Tealium is a dynamic platform that comes with a highly extensible iQ Tag Management system to manage mission-critical technologies with ease and comfort.