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.
PagerDuty - Cloud based monitoring service
Prometheus - An open-source systems monitoring and alerting toolkit.
Dynatrace - Cloud-based quality testing, performance monitoring and analytics for mobile apps and websites. Get started with Keynote today!
Nagios - Complete monitoring and alerting for servers, switches, applications, and services
TeamViewer - TeamViewer lets you establish a connection to any PC or server within just a few seconds.