Pilpil
Pilpil - Progressive Image Loading
Webpack
Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jade, coffee, css, less, ... and your custom stuff.
Px Loader
PxLoader is a simple JavasScript library for creating preloaders and resource downloaders for HTML5 apps.
Lazyload
Tiny, dependency-free async JavaScript and CSS loader.
Aload
Loads images, scripts, styles, iframes, videos and audio asynchronously.
Queue
Yet another asynchronous helper library for JavaScript. 387 bytes minified and gzipped!
Oc Lazy Load
Load modules on demand (lazy load) in AngularJS
Query Loader2
Version of the QueryLoader by Gaya Design. Preload images with ease.
Lazy Load Xt
Lazy load XT is a jQuery plugin for images, videos and other media
Blazy
bLazy is a lightweight lazy loading and multi-serving image script. It's written in JavaScript why it doesn't have any dependencies for 3rd party libraries like jQuery. bLazy is working in all modern browser including IE7+.
Nanobar
Very lightweight progress bars. No jQuery
Lozad.js
🔥 Highly performant, light ~0.9kb and configurable lazy loader in pure JS with no dependencies for responsive images, iframes and more
Head js
The only script in your HEAD. Head JS loads JavaScript files in parallel like images without blocking the page. Your page will be faster. Even with a single combined file.
RequireJS
A file and module loader for JavaScript
Sea.js
A Module Loader for the Web
Imagesloaded
JavaScript is all like "You images done yet or what?"
jQuery Pjax
pushState + ajax = pjax