OllyDbg - OllyDbg is a 32-bit assembler level analysing debugger.
Valgrind - Valgrind is an instrumentation framework for building dynamic analysis tools.
strace - Trace system calls and signals. A diagnostic, debugging and instructional userspace utility.
perf - Perf is a simple app monitoring solution paired with meaningful alerts.
X64dbg - X64dbg is a debugging software that can debug x64 and x32 applications.
ftrace - A function tracer for the Linux kernel.