QuickStep is a fast, simple image viewer. It can
read JPG, PNG, GIF, and TIFF images. It can locate
and display images of those types within ZIP, RAR,
and TAR archives. QuickStep can be started from
the Finder but is also designed to work well when
started from a terminal. It is keyboard friendly:
most commands use single keystrokes instead of
Command-key combinations. It can display images
fullscreen and run a slideshow.