Xee is described as 'Streamlined and convenient image viewer and browser. It is similar to macOS's Preview.app, but lets you easily browse the entire contents of folders and archives, move and copy image files quickly, and supports many more image formats' and is a popular Image Viewer in the photos & graphics category. There are more than 50 alternatives to Xee for a variety of platforms, including Windows, Mac, Linux, Flathub and Xfce apps. The best Xee alternative is IrfanView. It's not free, so if you're looking for a free alternative, you could try IrfanView or ImageGlass. Other great apps like Xee are Evince, qView, Gwenview and JPEGView.
A no-nonsense hardware-accelerated image viewer. Oculante's vision is to be a fast, unobtrusive, portable image viewer with wide image format support, offering image analysis and basic editing tools.
Fly Photos is one of the fastest photo viewers built for Windows, designed as a modern replacement for the now-discontinued Google Picasa Photo Viewer.
Diffractor unifies managing photo, video and audio files. If you centralize media on that trusty old PC; let Diffractor do the heavy lifting.
Australia
Eye of GNOME is the official image viewer for the GNOME Desktop environment. With it, you can view single image files, as well as large image collections. The Eye of GNOME supports a variety of image file formats.
United States
NX Studio is a computer software that allows users to enjoy the viewing, processing, and editing of still images and video, and provides more intuitive operation.
Japan
Create, Convert, Review and Edit PDF Documents on Windows, macOS, and Linux.
United States
Plug in your memory cards and start picking winners and deleting rejects almost instantaneously. Move from image to image without that annoying rendering delay. Add dynamic caption, copyright, and keyword information individually or in batches.
Pixea is an image viewer for macOS with a nice minimal modern user interface. Pixea works great with JPEG, HEIC, PSD, RAW, WEBP, PNG, GIF, and many other formats.
Geeqie is a free open software image viewer and organiser program for Linux, FreeBSD and other Unix-like operating systems.
Czechia
EU
feh is an X11 image viewer aimed mostly at console users. Unlike most other viewers, it does not have a fancy GUI, but simply displays images. It is controlled via commandline arguments and configurable key/mouse actions.
GermanyEU
Xviewer is a simple image viewer which uses the gdk-pixbuf library. It can deal with large images, and zoom and scroll with constant memory usage. Its goals are simplicity and standards compliance. Xviewer is installed by default in Linux Mint.
IrelandEU
Simplistic Image Viewer with focus on speed of rendering and switching between images. A good complement when no editing capabilities are nessesary.
SwedenEU
