strace - Trace system calls and signals. A diagnostic, debugging and instructional userspace utility.
OllyDbg - OllyDbg is a 32-bit assembler level analysing debugger.
ftrace - A function tracer for the Linux kernel.
WinDbg - WinDbg is a multipurposed debugger for Microsoft Windows, distributed on the web by Microsoft as...
Valgrind - Valgrind is an instrumentation framework for building dynamic analysis tools.
IDA - The best-of-breed binary code analysis tool, an indispensable item in the toolbox of world-class software analysts, reverse engineers, malware analyst and cybersecurity professionals.