NES - SNES Editors & Programs:
Breath of Fire ROM Editor (SNES). This is a new and improved version.
Download Breath of Fire ROM Editor ver 2.5
RHDN is no longer active so the version there is outdated. Ver 2.4a fixes a bug where you get an error when editing Lk-Up spell strength.
Version 2.5 lets you edit enemy elemental weaknesses and behavior.
Also available at RHDN with a full description (this version is now outdated!): Breath of Fire ROM Editor
Breath of Fire ROM Editor (SNES/GBA). There is a newer SNES version available above.
Download Breath of Fire ROM Editor ver 1.1a
Also available at RHDN with a full description: Breath of Fire ROM Editor
Breath of Fire 2 ROM Editor (SNES/GBA).
Download Breath of Fire 2 ROM Editor ver 1.6
Version 1.5 adds support for BoF2 Definitive Edition v1.3, and adds option to turn off messages in editor (see Readme).
Version 1.6 now lets you rename characters with BoF2 Definitive Edition v1.3.
Also available at RHDN with a full description: Breath of Fire 2 ROM Editor
NES - SNES Search/Patch Tool
Download NES-SNES Tool ver 1.1
Also available at RHDN with a full description: NES - SNES Search/Patch Tool
RAM to ROM Search Tool (SNES).
Download RAM to ROM Search Tool ver 1.0
Can read much more about the tool here: RAM to ROM Search Tool
Shadowrun ROM Editor (SNES).
Download Shadowrun Editor ver 1.3
Also available at RHDN with a full description: Shadowrun editor
Tales of Phantasia ROM Editor (SNES).
Download Tales of Phantasia ROM Editor ver 1.0
Can read much more about the editor here: Tales of Phantasia ROM Editor
Zombies Ate My Neighbors ROM Editor (SNES).
Download Zombies Ate My Neighbors Editor ver 1.2
Also available at RHDN with full description: Zombies Ate My Neighbors editor