IDA PRO 5.2

IDA PRO - Its interactivity allows you to improve disassemblies in real time
IDA Pro is a programmable, interactive, multi-processor disassembler combined with a local and remote debugger and augmented by a complete plugin programming environment.

IDA Pro is in many ways unique. Its interactivity allows you to improve disassemblies in real time. Its multi-processor support is unmatched. Yet, two of our technologies are truly unique, have never been implemented under any form in any real-life disassemblers and, more importantly, are incredible time savers.

IDA Pro is a disassembler.

As a disassembler, IDA Pro explores binary programs, for which source code isn't always available, to create maps of their execution. The real interest of a disassembler is that it shows the instructions that are actually executed by the processor in a symbolic representation called assembly language. If the friendly screen saver you have just installed is spying on your e-banking session or logging your e-mails, a disassembler can reveal it. However, assembly language
is hard to make sense of. That's why advanced techniques have been implemented into IDA Pro to make that code more readable, in some cases, quite close to the original source code that produced the binary program. The map of the program's code then be postprocessed for further investigations. Some people have used it as the root of a genomic classification of viruses. (digital genome mapping – advanced malware analysis)

IDA Pro is a debugger.