Immunity Debugger - an exploit development debugger

Immunity Debugger is a powerful new way to write exploits, analyze malware, and reverse engineer binary files. It builds on a solid user interface with function graphing, the industry's first heap analysis tool built specifically for heap creation, and a large and well supported Python API for easy extensibility. It is similar to OllyDbg in functionality and interface.

Immunity Debugger is said to cut exploit development times in half and has a powerful scripting language and connectivity to fuzzers and exploit development tools.