WP Lightbox 2 is awesome tool for adding responsive lightbox effect for images and also create lightbox for photo album/gallery on your WordPress blog
An ultra lightweight jQuery lightbox for WordPress images and galleries.
Lightbox - Gallery Lightbox WordPress plugin is an high customizable and responsive product for displaying images and videos in popup.
Email opt-in widget that gathers visitors’ emails while they surf your site. Creates email collection popup in bottom right or middle of screen.
Nice solution to add responsive lightbox (overlay) to display images, videos and galleries. Attract users with cool lightbox effects
Plugin creates a custom post to create popup on your homepage, popups can be configured such date of publication and date of expiration, may be placed