Viso - Beautiful minimal image viewer for MacOS
Magnific Popup - The greater part of Lightbox modules will completely preload a picture before showing it.
digiKam - Professional Photo Management with the Power of Open Source
jQuery Lightbox - jQuery Lightbox plugins are utilized to showcase images and other web stuff using modal dialogs.
Tiat - A simple and powerful image organizer 🖼️
prettyPhoto - prettyPhoto is a jQuery Lightbox clone.