Responsive Photo Gallery & Lightbox – FG-Gallery
FG-Gallery is a lightweight, easy-to-use and responsive JavaScript gallery library where the users are able to browse all images in a lightbox popup with arrows navigation.
Modal & Popup
Customizable Browser Update Prompt Dialog – badbrowser.js
badbrowser.js is a JavaScript library that detects the outdated browser and displays a custom dialog popup to prompt the users to update their browser.
Customizable Multi-media Lightbox Library – Lightbox.js
The Lightbox.js JavaScript library allows media content (images, text, Youtube/Vimeo videos, etc) to be displayed in an elegant modal dialog.
Beautiful Image Gallery Lightbox In Vanilla JS – Gallery Box
Gallery Box is a lightweight JavaScript plugin to showcase several images in a gallery popup where the users are able to navigate between images with navigation buttons and keyboard arrows.
Pretty Non-blocking Dialog Popup JavaScript Plugin – Prompt-Boxes
The Prompt-Boxes JavaScript plugin used to create nice, clean alert/confirm/prompt dialog boxes and toast-like notification popups on your web app.
HTML5 Dialog Element Polyfill
A JavaScript polyfill for the HTML5 dialog element to create interactive dialog UI components on all major browsers.
CSS Only Responsive Modal Window – Light Modal
Light Modal is a lightweight (2kb minified) CSS library to create responsive, customizable, CSS3 animated modal windows with no dependency.
Multifunctional Lightbox/Gallery/Dialog Library – MODALit
The MODALit JavaScript library lets you create responsive, CSS3 animated lightbox, dialog boxes, modal windows, gallery popups on the web page.
Minimal Any Content Lightbox In Pure JS – microlightbox
microlightbox is a minimal JavaScript lightbox plugin for showing any HTML content in a responsive popup with a configurable overlay.
Minimal Flexible Modal Window Library – Modal.js
Modal.js is a minimal, flexible, performant and customizable modal window library written in pure JavaScript.