Viewnior - Very simple and fast image viewer. No support for IPTC metadata such as image tags/keywords.
IrfanView - IrfanView ... one of the most popular viewers worldwide.
sxiv - Simple X Image Viewer. Contribute to muennich/sxiv development by creating an account on GitHub.
ImageGlass - You can use Image to view your digital images and photos of many different formats.
nomacs - nomacs is a free, open source image viewer, which supports mu
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!