Midway.js
Automatically center responsive elements!
Backbone.notifier
Notifications framework for Backbone.js
jQuery Snipe
jQuery plugin to add a sniper-lens-style zoom on images
jQuery Resizable Columns
Resizable table columns for jQuery.
Mixitup
A CSS3 and jQuery Filter & Sort Plugin
Itemslide.github.io
A simple and beautiful JavaScript touch carousel
Highlighter.js
Easily navigate the DOM and highlight the elements - http://720kb.github.io/highlighter.js/
q Tip2
qTip2 - Pretty powerful tooltips
jQuery.simple Weather
A simple jQuery plugin to display current weather data for any location and doesn't get in your way. Now supports HTML5 GeoLocation!
Upfile
Makes file inputs a pleasure to use with progressive enhancement.
Bootstrap Tour
Quick and easy product tours with Twitter Bootstrap Popovers
FullCalendar
Full-sized drag & drop event calendar (jQuery plugin)
Wijmo Open
Open Source jQuery UI widgets
Amaran Js
Nice, sleek and stylish notifications.
Bootstrap Progressbar
progressbar interactions for twitter bootstrap 2 & 3
Faviconx
A tiny javascript library that makes progress bars out of the favicon placeholders.
J Box
jBox is a powerful and flexible jQuery plugin, taking care of all your popup windows, tooltips, notices and more.