I'm a bit of a novice with IDA Pro, and have been discovering some of the excellent plugins available from the RE community as well as its vendors. My small list of plugins that I have found extremely valuable to me are:
- Hex-Rays Decompiler (commercial) - convert program to pseudo-C
- IDA Toolbag - Adds too much awesome functionality to IDA to list. Just see/read about it.
- IDAscope - Function tagging/inspection, WinAPI lookup, Crypto identification
Granted, this is a very short list. What IDA Pro scripts/plugins do you find essential?