Geeqie Lightweight Image Viewer
Geeqie is a free and open source image viewer and image organizer for Linux, BSD, MacOS and Solaris. It is a fork of another popular image viewer GQview. You can view all image metadata and Exif/IPTC/XMP data from image. It also supports colour histograms and image tags, keywords and comments options. Some other useful features are OpenStreetMap map for GPS coordinates in image, Zoom, Thumbnails, caching, File grouping, Drag and drop, Collections, image rating, build-in duplicate finder.