XnView - best graphic viewer. New version 2.23
is an efficient multimedia viewer, browser and converter.
Various viewing settings include tabbed interface, fullscreen, slideshow, web page, contact sheet, image compare, and filmstrip layout. Includes scanner support, screen capture, Photoshop's 8bf plugins, image search, histogram, metadata viewer, automatic crop (deletes background), watermark, flash export, and more.
Really simple to use! Support of more than 500 image formats .
XnView portable download