JavaScript Image Modal Popup UI Tutorials and Examples

Ovrly.js is a lightweight JavaScript lightbox library, it can display images in a responsive modal popup.

ivid | Building an Interactive HTML5 Video Player with JavaScript
switch | Creating iOS Style Switch Button with CSS
Bubbly Button | Creating a Button with Bubble Confetti Effect
Viewer.js | View Full Image By Clicking with JavaScript
MultiDialog | A Powerful jQuery UI Dialog Widget for Modalbox / Lightbox Application

UICodex