OllyDbg - OllyDbg is a 32-bit assembler level analysing debugger.
BugTracker.net - BugTracker.NET is a free, open-source, web-based bug tracking and general purpose issue tracking application. It is in daily use by thousands of development, customer support, and help desk teams around the world.
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.
Immunity Debugger - Immunity Debugger is a powerful new way to write exploits, analyze malware, and reverse engineer...
SoftICE - SoftICE is a debugging software for windows and DOS that analyzes all your programs and repairs them.
X64dbg - X64dbg is a debugging software that can debug x64 and x32 applications.