The Immunity Debugger can analyze malware and reverse engineer applications for exploit development. According to Immunity, the tool can cut exploit development time by 50 percent. The current standard, IDA Pro, costs about $500, while Immunity’s Debugger is free. The tool is based on the source code from OllyDbg, a free tool that currently runs a close second to IAV Pro. Based on Immunity’s track record, I think there’s a good chance it will be a winner.”]
Source: https://www.darkreading.com/attacks-breaches/exploits-in-the-fast-lane