Image viewers

Ristretto is an image viewer for the Xfce desktop environment. Free and open source program

Pix is an image manager and image viewer. Free and open source program

vipsdisp is a free and open source program for viewing very large images

ParaPara is a free and open source, lightweight image viewer with three display modes: single, spread, and continuous

Image Roll is a free and open source, simple and fast image viewer with basic image manipulation tools

Koko is a free and open source image viewer designed for desktop and touch devices

CoreImage is a free and open source, lightweight and easy to use image viewer for Linux

Qimgv – free and open source fast, configurable, easy to use image viewer with optional video support for Linux and Windows

PhotoQt is a free and open source multiplatform, fast and simple, yet powerful and highly configurable image viewer