Cloudinary
Cloudinary streamlines your web application’s image manipulation needs. Cloudinary's cloud-based servers automate image uploading, resizing, cropping, optimizing, sprite generation and more. Cloudinary's jQuery plugin allows direct uploading from the browser to the cloud and dynamic cloud-based image transformations and effects.
Sebastian Tschan
File Upload widget with multiple file selection, drag&drop support, progress bar, validation and preview images, audio and video for jQuery. Supports cross-domain, chunked and resumable file uploads. Works with any server-side platform (Google App Engine, PHP, Python, Ruby on Rails, Java, etc.) that supports standard HTML form file uploads.
anseki
The simple jQuery Plugin for customizable overlay which covers a page, elements or iframe-windows that is specified.
Webshim – polyfills jQuery with many HTML5 features
Alexander Farkas
modular capability-based polyfill loading libary, which extends jQuery with HTML5 features in legacy browsers
Jan Paepke
The jQuery plugin for magical scroll interactions.
Michael Lynch
A simple, lightweight jQuery plugin used to display a progress bar at the top of the page that fills up as the user scrolls.
Sylvie Versterren
Let it Flow! displays a progress bar to see where you are in a defined timeline
Kevin Sylvestre
Spin is a jQuery plugin that creates animated loading indicators with only CSS and JavaScript.
ProgressBar – jQuery Tiny Progress Bar
Mehrdad Noroozi Eghbali
ProgressBar is a tiny and simple jQuery plugin that displays status of a determinate or indeterminate process.