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.
SwiftyBeaver - SwiftyBeaver is a logging platform for Swift with end-to-end encryption.
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.
Seq - Seq is the easiest way for .NET developers to capture, search and integrate structured log events.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
NewRelic - New Relic is a Software Analytics company that makes sense of billions of metrics across millions of apps. We help the people who build modern software understand the stories their data is trying to tell them.