API Monitor - API Monitor is a software that monitors and displays API calls made by applications and services. Its a powerful tool for seeing how Windows and other applications work or tracking down problems that you have in your own applications
VisualVM - VisualVM is a visual tool integrating several commandline JDK tools and lightweight profiling...
Microsoft Research Detours - Detours is a software package for re-routing Win32 APIs underneath applications.
OProfile - OProfile is an open source project that includes a statistical profiler, capable of profiling all running code at low overhead.
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).
MemoryLogic - MemoryLogic offers tools to add process id and memory usage in rails logs and to track memory leaks.