User blog comment:MugoUrth/Bandwagon sprites./@comment-3495717-20130130213911/@comment-3495717-20130203215555

I suggested Infranview, which is only a megabyte or two (yeah, it's tiny), which can index images, though as I've said, I've never used it before.

In FF's palette editor, clicking on a colour of an image will direct you to the exact opposite position as to where that colour is located in the palette table (if the block selected is top-left, the actual colour is bottom-right).