iNES Cart Header ToolNintendo Utility in General Category
This is a rather comprehensive utility for viewing and editing iNES headers on NES ROMs. The GUI makes everything very simple to change, so this is perfect for those not wanting to mess with a commandline to change the header on their NES ROM.
Author's website: http://ugweb.cs.ualberta.ca/~konash/demos/iNESInfo/
Operating System: Windows