tniNESNintendo Utility in General Category
This is a utility like NESimage. It's an editor for the .nes rom header format, and it supports all mappers, including the extended mappers that fwNES uses. It has all kinds of other features, and support for Unisystem VS roms. This is a rather nice utility to have, it's worth the download.
Author's website: http://huizen.dds.nl/~patriekl/tniNES.html
Operating System: DOS