Lightbox is the perfect tool for viewing photos.
Lightbox Gallery plugin is allow users to view larger versions of images, simple slide shows and Gallery view with Responsive grid layout.
Huge-It Popup Colorbox is the most spellbinding plugin in WordPress that implement Lightbox-effect look of the images and videos
Automatically enables thickbox on thumbnail images (i.e. opens the images in a fancy pop-up).
A cleaner WordPress [gallery] that integrates with multiple Lightbox-type scripts.
Always Valid Lightbox Mod is a Lightbox plugin which adapts to site's DOCTYPE and provides a valid HTML markup.
Clifton's Lightbox implements a lightbox subscription form overlay. Features a title, list, call-to-action, and image or video.
Always Valid Lightbox is a Lightbox plugin whose markup adapts to the WP site's Doctype, in order to always provide valid HTML markup.
Shadowbox is an online media vieiwing application similar to Lightbox and Thickbox but with more functionality. Supports all types of media.
Addon plugin for Nextgen Gallery that adds the ability to have video lightboxes
This plugin will self-destruct within 5 minutes of installation. No, seriously, download Satellite instead
A simple lightbox plugin designed to enable you to display html content within a popup window using just about any html element as a trigger.
tscopper allows inclusion of images from Coppermine gallery via shortcode.
This plugin for WordPress automatically add the rel="lightbox[ID-OF-THE-POST]" and recovers the image title.
This plugin is WordPress shell for FloatBox library by Byron McGregor. FloatBox is similar to Lightview, Lightbox, Shadowbox, Fancybox, Thickbox, etc.
Display a post as a site wide announcement, notice, ad or emergency alert on your website via a marquee or popup window using ShadowBox-JS or ThickBox
PhotoJAR: Base provides numerous enhancements to the WordPress gallery and provides a framework for additional PhotoJAR plugins.