P-Loading is a powerful jQuery plugin, for faster and easier web development, which allows you to have a main loading mask platform that is able to use many different spinners by installing P-Loading add-ons.
A tutorial on how to create a loading spinner made with inscribed polygons and animated with Rebound spring motion.
Little Loader is a lightweight, IE8+ JavaScript loader.
Features:
LoadJS is a tiny async loading library for modern browsers. It has a simple yet powerful dependency management system that lets you fetch files in parallel and execute code after the dependencies have been met.
CircularLoader.js is a jQuery plugin made using HTML5 and javascript to create customizable cicular progress bars with or without percentage values. It can be used to create a progress indicator. It is a fully customizable plugin which works with all browsers compatible with HTML5.
A tutorial on how to write a CSS3 progress bar and add some cool animation, along with a jQuery counter.
ClassyLoader is a jQuery plugin that lets your add beautiful and animated loaders to your website.
spin.js is an animated CSS3 loading spinner with VML fallback for IE. It dynamically creates spinning activity indicators that can be used as resolution-independent replacement for AJAX loading GIFs.
Also you can use spin.js as a jQuery plugin.
jQuery Fadeloader plugin lets you easily implement a preloader to your site or section, using a cascade fade in effect to show specific blocks of content.
Loadie.js is a lightweight jQuery plugin to create a preloader that doesn't suck.
imageloader is a jQuery plugin for preloading images.
jQuery Waiting is a jQuery plugin to generate spinners and loaders, without images, canvas, or other nonsense. jQuery Waiting uses standard, widely accepted css to style your waiting spinner, and a little jQuery to make it function
What QueryLoader2 does is simply scanning the given elements for images (and background images) and preloading them before the website is visible.
This version has been modified to make it easier for users to implement (especially those who are already into jQuery).
Percentage Loader is a jQuery plugin for displaying a progress widget in more visually striking way than the ubiquitous horizontal progress bar / textual counter. It makes use of HTML5 canvas for a rich graphical appearance with only a 10kb (minified) javascript file necessary , using vectors rather than images so can be easily deployed at various sizes.