ImageMagick can do this with the "display" program. "display *.png" or whatever. Space to go forwards. Backspace to go back. Completely clean interface with no superfluous controls - unless you click on the image. Very nice.
But it's so slow that it's unusable on my (admittedly aging) box. About five seconds to wait before next image is displayed (when resizing is necessary). Other viewers like ida or gthumb are around 1/2 sec.
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