RHEV - Red Hat Virtualization is an open source, software-defined platform that virtualizes Linux and Microsoft Windows workloads.
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.
Foglight - Foglight enables organizations to identify and resolve performance issues across the applications, databases, and virtual environments.
AppDynamics - Get real-time insight from your apps using Application Performance Management—how they’re being used, how they’re performing, where they need help.
vRealize Operations - vRealize Operations is a highly advanced IT operations management program that offers an intelligent operations management from simple applications to the infrastructure.
Zabbix - Track, record, alert and visualize performance and availability of IT resources