Flexible Image Lazy Loader – kit.lazy.js
kit.lazy is a small, simple image lazy loading library that supports image tag, background image, and asynchronous images loading.
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Delay The Loading Of Images Until Needed – lazy-image
The lazy-image library allows to load image sources on-demand (e.g. click, in view, etc).
12+ Pure CSS/SCSS Loading Indicators – SpinThatShit
SpinThatShit is a set of 12+ pure CSS single element loading spinners which can be used to indicate the content loading status in an elegant way.
Delay Loading Of Iframe Embedded Content Until Clicking – lazyembed.js
lazyembed.js is a lazy loading library for iframe embedded content such as Youtube/Vimeo videos, Google Maps, etc. The library delays the loading of these iframe content until clicked, with custom placeholder support.
Vanilla JavaScript Library For Image Lazy Load – vanillaLazyLoad
Yet another vanilla JavaScript library that helps delay the loading of images until they become visible in the viewport.
Modern Retina-ready Image Lazy Loader – lazyestload.js
A modern, fast, lightweight image lazy load JavaScript library that provides 2 methods to lazy load images with support for retina and responsive images.
Pure CSS Loading Indicator Collection – mk-spinners
mk-spinners is a fresh new collection of cool animated loading indicators/spinners created by pure CSS/SASS.
Customizable Button Loader In JavaScript – Btn-loader
Btn-loader is a tiny, dependency-free JavaScript library that replaces the regular button with a customizable loading indicator when clicked.
16 Animated CSS3 Loaders – LoadLab
Yet another CSS loader collection that provides 16 animated loading indicators/spinners based on CSS3 animations and plain HTML structure.
Google Inbox Inspired Preloader With Pure JavaScript – Prelodr
Prelodr is a native JavaScript library (also can be used as a jQuery plugin) that helps create a Google Inbox style content preloader with async and chaining support.