Official website button is incorrect, it's not linuxmint.org. It is linuxmint.com!
From the Mint Community portion of the site:
"Xviewer is a simple image viewer which uses the gdk-pixbuf library. It can deal with large images, and zoom and scroll with constant memory usage. Its goals are simplicity and standards compliance."
xviewer is based on Eye of Gnome, but for Linux mint ONLY, so you may want to just use that if you're not on Mint. Or try one of the many other alternatives that may suit your OS better.