Oink - Oink is a Rails plugin and log parser to help narrow down the source(s) of increased memory usage in rails applications.
Munin - PnP networked resource monitoring tool that can help to answer the what just happened to kill our performance
Robot Console - Robot Console is a Message and Event Monitoring Software for IBM i thathas automatic message management, resource monitoring, and log monitoring.
dotMemory - dotMemory allows users to analyze memory usage in a variety of .NET and .NET Core applications.
VisualVM - VisualVM is a visual tool integrating several commandline JDK tools and lightweight profiling...
Valgrind - Valgrind is an instrumentation framework for building dynamic analysis tools.