JNesG
JNesG is a project I wrote many years ago, back when Java 1.4 was current. It is an editor for NES graphics.
With JNesG, you can load an NES rom and extract all the graphic information in it. Once extracted, you can edit the graphics much like a standard graphics program. When happy, inject the edited graphics back into the ROM and run it in an NES emulator.
Programs like JNesG are how people hack ROMs with custom graphics. They are also used by people creating new NES programs.
