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.
Komodor - The Kubernetes native troubleshooting platform
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Google StackDriver - Stackdriver provides monitoring services for cloud-powered applications.
Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
ALog ConVerter - Server access log solution for finance and manufacturing