MeanMenu is a menu system for converting a standard menu into a mobile/tablet responsive menu, media query independent. MeanMenu

jQuery.balloon is a jQuery plugin to add balloon tips to elements. It's user-friendly, fine-tunable and without css and images

MediaSlide is a jQuery UI plugin that allows you to browse a collection of media items.    MediaSlide - 

jQuery PrettyCheckable replaces the default checkboxes and radio inputs for better looking ones.  

jQuery Flip Plugin is a jQuery/jQuery mobile plugin to give Flipboard app like effect. Flip effect uses css 3d transform. Flip effect

Ion.Tabs is a jQuery tabs plugin that has easy and well done tabs with many options and skin support.  

jQuery Flip-Quote creates a pull-quote from a text quote found in the document and flips to reveal the quote once it's scrolled

jQuery Vortex is a jQuery plugin which displays HTML elements elliptically, optionally rotating them. You can put any kind of element

jQuery.mmenu is a jQuery menu plugin for creating app look-alike, responsive, sliding, off-canvas menus for you mobile and desktop responsive

Tag Manager is a jQuery plugin to create tag input fields, which works nicely with Twitter Typeahead.js and Twitter Bootstrap