nomacs is described as 'Free, open source image viewer, which supports multiple platforms. You can use it for viewing all common image formats including RAW and psd images' and is a very popular Image Viewer in the photos & graphics category. There are more than 50 alternatives to nomacs for a variety of platforms, including Windows, Linux, Mac, Flathub and Xfce apps. The best nomacs alternative is IrfanView. It's not free, so if you're looking for a free alternative, you could try IrfanView or XnView MP. Other great apps like nomacs are FastStone Image Viewer, XnView Classic, Gwenview and qView.
Seamlessly browse and share images directly from your menu bar application, with support for tagging, searching, and drag-and-drop functionality. Experience full keyboard control and effortless integration with the pasteboard, enabling automatic image collection and streamlined workflows.
Quick Picture Viewer is a lightweight, versatile desktop image viewer for Windows. The best replacement for the default Windows photo viewer.
Viso is a beautiful minimal image viewer for MacOS. Features a non intrusive UI that allows you to get the most viewing experience out of your images.
This program is a simple picture viewer and manipulator. Multiple images can be opened at once for viewing and editing. The program includes several painting tools and effects that can applied to images. It is freeware/open source.
Unifie is a fast, thumbnail-focused image viewer with dual viewing surface that lets you see two folders of images side-by-side for easy comparison.
Vipsdisp can display huge (many, many gigabyte) images quickly and without using much memory. As well as the usual PNG, JPG, TIF, PDF, SVG, WEBP, JP2, JXL and GIF, it supports many scientific and technical image formats, including SVS, MRXS, OpenEXR, FITS, Matlab, NIfTI...
Xee is an 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.
sxiv is a simple image viewer for X. It only has the most basic features required for fast image viewing.
“Smart SVG Viewer” is a free, fast and convenient SVG image viewer with Thumbnail Gallery and Transparency Grid. It is a must-have tool for UI/UX design, Web design, and Graphic design.
Mirage is a fast and simple GTK+ image viewer. Because it depends only on PyGTK, Mirage is ideal for users who wish to keep their computers lean while still having a clean image viewer.
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