EasyHook - The reinvention of Windows API Hooking
VisualVM - VisualVM is a visual tool integrating several commandline JDK tools and lightweight profiling...
Deviare API Hook - Deviare is a professional open source hooking engine for instrumenting arbitrary Win32 functions, COM objects, and functions which symbols are located in program databases (PDBs).
Valgrind - Valgrind is an instrumentation framework for building dynamic analysis tools.
madCodeHook - "madCodeHook" offers everything you need to hook code (mostly APIs).
dotMemory - dotMemory allows users to analyze memory usage in a variety of .NET and .NET Core applications.