Fotoxx
Fotoxx is an open-source Linux program that allows you to edit and manage images. It is designed to meet the needs and speed of serious photographers, while also being easy to use. You can navigate a large collection of images using a thumbnail browser. Click on an image to view it or edit it. There are many retouch and edit functions available. You can import RAW files and apply deep color editing. Rejected images can be saved as JPEG, TIFF (8/16), or PNG (8/16). Select an area or object within an image (freehand drawing, following edges, flood matching colors), apply edit functions and copy and paste. Without using layers. The full image can be edited quickly using the edit functions. Edit metadata of images (tags, geotags and ratings, captions, dates, ratings and captions). Search images with any combination of metadata, file and folder names, or partial names. To view all photos taken at that location, click on a marker on a scalable map.
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Picview
Picview is a macOS image viewer with a minimal, modern interface. Picview is compatible with JPEGs, HEICs, PSDs, RAWs, WEBPs, PNGs, GIFs, and other formats. Basic image processing is available, including flip, rotate, EXIF and other information. Supports keyboard shortcuts as well as trackpad gestures. Picview is similar to Windows' default photo viewer -- Photos. You can zoom in and out using the mouse wheel, and switch between pictures with arrow keys or on-screen buttons.
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XnView
XnView MP/Classic, a free image viewer, allows you to open and edit your photo files. The Image Viewer supports all major formats of images (JPEG and TIFF, PNG. GIF, PNG. WEBP, PSD. JPEG2000. OpenEXR. Camera RAW. HEIC. PDF. DNG. CR. Image Viewer offers many features, including color adjusting, cropping, screen capture and metadata editing (IPTC, DNG, XMP). XnView MP's explorer-like interface makes it easy to view and manage your images and photos. There are many features, including batch rename, batch convert, duplicate image finder and image compare. You can also create contact sheets and slideshow.
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Lyn
Lyn for macOS, a lightweight media viewer and browser, is designed for web designers, graphic artists, and photographers. Lyn offers a versatile and attractive interface that allows you to share your photos with ease. Lyn natively supports all major image formats, including standard formats, HDR and RAW, as well as any other image format that macOS supports. It integrates a movie player that allows you to view your camera recordings, as well as a PDF viewer. The new editing inspector makes it easy to transform your photos into great ones. You can adjust the exposure, color temperature and brightness or reveal details with highlight, shadow, and contrast. You can adjust the individual levels and curves, or you can change colors selectively. You can experiment with your color photos and convert them to black and white. Or you can add a vignette border, film grain, or classic sepia tone.
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