strace - Trace system calls and signals. A diagnostic, debugging and instructional userspace utility.

Process Monitor - Monitor file system, Registry, process, thread and DLL activity in real-time.

ftrace - A function tracer for the Linux kernel.

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

Valgrind - Valgrind is an instrumentation framework for building dynamic analysis tools.

Windows Task Manager - Need assistance with your Microsoft product? Find helpful articles for Windows, Office, Microsoft Account, Microsoft Store, Xbox, and more.