Viewnior - Very simple and fast image viewer. No support for IPTC metadata such as image tags/keywords.
nomacs - nomacs is a free, open source image viewer, which supports mu
sxiv - Simple X Image Viewer. Contribute to muennich/sxiv development by creating an account on GitHub.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
feh - feh is an X11 image viewer aimed mostly at console users.
qimgv - Simple image viewer written in qt. Supports webm playback.