Kcachegrind - Callgrind is a profiling tool and KCachegrind is able to visualize output of the profilers.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Valgrind - Valgrind is an instrumentation framework for building dynamic analysis tools.
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.
dotMemory - dotMemory allows users to analyze memory usage in a variety of .NET and .NET Core applications.
Prometheus - An open-source systems monitoring and alerting toolkit.