Gpicview
From wikinotes
gpicview is a gui image viewer, similar to microsoft's image viewer.
You can preview, rotate an image etc.
Documentation
homepage http://lxde.sourceforge.net/gpicview/
Configuration
Default ImageViewer
pacman -S xdg-utils xdg-mime default gpicview.desktop `grep 'MimeType=' /usr/share/applications/gpicview.desktop | sed -e 's/.*=//' -e 's/;/ /g'`