In response to another thread about palette wrangling I remembered this old editor I used to use sometimes.
Its called I.Mage
https://sourceforge.net/projects/image-editor/It looks like it would be a good sprite editor to boot, but the main feature I always use it for is generating Custom Palettes. It does a good job of creating and changing palette colors quickly and has a Gradient function to give you an entire spread of colors in an instant.
(in contrast I used to rely on an old dos build of Fractint to mess around with color palettes, saving them in an image screenshot . . . how archaic).
This is good for creating Matte Palettes for Recoloring sprites, and funneling color indexes away from bad colors that you dont want to use (id change those to something you'd never use in your image, like
Flaming-Gay Hot Flamingo Pink rather than an utterly confusable black).
But really I was just using the program to generate the palettes, have them saved in a .GIF file so some other program like Paint Shop Pro or Photoshop could pick it up out of the image.
Speaking of which, I should probably pick up PSP again
