ExifTool is a free and open-source software program for reading, writing, and manipulating image, audio, video, and PDF metadata. Developed by Phil Harvey
License: Open Source
Geeqie Image Viewer is primarily an image viewing application with lightweight features and user-friendly customization options, while ExifTool is a powerful command-line tool focused on metadata editing and bulk processing capabilities. The choice between the two depends on whether users prioritize image viewing or advanced metadata handling.