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.




opti is described as 'Simple, transparent media viewer' and is a Image Viewer in the photos & graphics category. There are more than 25 alternatives to opti for a variety of platforms, including Linux, Mac, Windows, Flathub and GNOME apps. The best opti alternative is nomacs, which is both free and Open Source. Other great apps like opti are qView, Gwenview, PureRef and Musebox.
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.




Fast and lightweight Qt-based image viewer with support for Windows, macOS, and Linux. Features include multiple format support, customizable interface, GIF playback, high-resolution display compatibility, and efficient navigation through keyboard shortcuts.




Offers quick browsing and display of various image formats, basic editing tools like crop, rotate, lossless JPEG manipulation, folder browsing as thumbnails or slideshows, supports XCF, drag-and-drop, metadata viewing, KDE integration, and plugin extensions.



PureRef was created to be a simple and lightweight tool for artists to organize and view their reference images. Image can be scaled and collage can also be made.





BeeRef lets you quickly arrange your reference images and view them while you create. Its minimal interface is designed not to get in the way of your creative process.

Waterfall-style image viewer for macOS, offering a smooth and immersive browsing experience.


gThumb is an image viewer and browser for the GNOME Desktop. It also includes an importer tool for transferring photos from cameras.




Photos is a digital photograph manipulation application developed by Apple, intended to be less complex than its predecessor iPhoto .




An image viewer and browser utility - primarily for Linux Mint. Pix is part of the X-Apps project, which aims at producing cross-distribution and cross-desktop software.


You can use the Photos app to view or edit photos and videos in your Pictures library and on OneDrive, and to import photos and videos. The Photos app includes a wide range of editing options to enhance your photos, from automatic fixes to advanced adjustments.




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.
