OllyDbg - OllyDbg is a 32-bit assembler level analysing debugger.
perf - Perf is a simple app monitoring solution paired with meaningful alerts.
strace - Trace system calls and signals. A diagnostic, debugging and instructional userspace utility.
ftrace - A function tracer for the Linux kernel.
X64dbg - X64dbg is a debugging software that can debug x64 and x32 applications.
SoftICE - SoftICE is a debugging software for windows and DOS that analyzes all your programs and repairs them.