OllyDbg - OllyDbg is a 32-bit assembler level analysing debugger.
X64dbg - X64dbg is a debugging software that can debug x64 and x32 applications.
WinDbg - WinDbg is a multipurposed debugger for Microsoft Windows, distributed on the web by Microsoft as...
Nirsoft Simple Program Debugger - Nirsoft Simple Program Debugger is a debugging software that analyzes and displays all major debugging events across your computer, after connecting to either the running program or starting a new program in the debugging mode.
SoftICE - SoftICE is a debugging software for windows and DOS that analyzes all your programs and repairs them.
perf - Perf is a simple app monitoring solution paired with meaningful alerts.