log4net - log4net is a tool to help the programmer output log statements to a variety of output targets.
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.
AWS CloudTrail - AWS CloudTrail is a web service that records AWS API calls for your account and delivers log files to you.
Dynatrace - Cloud-based quality testing, performance monitoring and analytics for mobile apps and websites. Get started with Keynote today!
Logary - Professional logging metrics and analytics for your apps
Zabbix - Track, record, alert and visualize performance and availability of IT resources