ManageEngine OpManager - Monitors routers, switches, firewalls, load-balancers, wireless LAN controllers, servers, VMs, printers, storage devices, and everything that has an IP and is connected to the network.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Cisco ACI - Application Centric Infrastructure (ACI) simplifies, optimizes, and accelerates the application deployment lifecycle in next-generation data centers and clouds.
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.
Extreme Networks - Extreme Networks (EXTR) delivers customer-driven enterprise networking solutions that create stronger connections with customers, partners, and employees.
Prometheus - An open-source systems monitoring and alerting toolkit.