dotMemory - dotMemory allows users to analyze memory usage in a variety of .NET and .NET Core applications.
Robot Console - Robot Console is a Message and Event Monitoring Software for IBM i thathas automatic message management, resource monitoring, and log monitoring.
Munin - PnP networked resource monitoring tool that can help to answer the what just happened to kill our performance
Kcachegrind - Callgrind is a profiling tool and KCachegrind is able to visualize output of the profilers.
JProfiler - JProfiler is the leading Java Profiler for profiling on the JVM. JProfiler's intuitive UI helps you resolve performance bottlenecks, pin down memory leaks and understand threading issues.
Valgrind - Valgrind is an instrumentation framework for building dynamic analysis tools.