Image viewers

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