Graphics file viewer under X11

 Can view png, jpeg, gif, tiff, niff, sunraster, fbm, cmuraster, pbm, faces,
 rle, xwd, vff, mcidas, vicar, pcx, gem, macpaint, xpm and xbm files. Can
 view images, put them on the root window, or dump them. Does a variety of
 processing, including: clipping, dithering, depth reduction, zoom,
 brightening/darkening and merging.
 .
 Includes xsetbg, xview and uufilter.