Visum Ristretto imago est applicatio quae ad visum et librum per imagines adhiberi potest.
nomacs
nomacs is a free, open source image viewer, which supports multiple platforms. You can use it for viewing all common image formats including RAW and psd images.
Oculus Gnome
Eye of GNOME is the GNOME image viewer.
Deepin Imago Visum
A simple Image Viewer
Flameshot
This is the Eye of MATE, an image viewer program.