And, FBOW Linux has the Gimp, which I prefer to Photoshop, though that's largely on account of familiarity.
ImageMagick itself is invaluable when what you need to do is programmatically change large numbers of images. I've seen it used on large (multi-million user) image-heavy sites as the standard image handling flow (thumbnails and default previews of standard sizes).
And, FBOW Linux has the Gimp, which I prefer to Photoshop, though that's largely on account of familiarity.
ImageMagick itself is invaluable when what you need to do is programmatically change large numbers of images. I've seen it used on large (multi-million user) image-heavy sites as the standard image handling flow (thumbnails and default previews of standard sizes).