Garlic.js
Garlic.js allows you to automatically persist your forms' text and select field values locally, until the form is submitted. This way, your users don't lose any precious data if they accidentally close their tab or browser.
Alpaca
Easy HTML5 Forms for jQuery
G2 Plot
:dango: An interactive and responsive charting library
Pikaday
A refreshing JavaScript Datepicker — lightweight, no dependencies, modular CSS
Magicsuggest
Multiple Selection Combo Box using Bootstrap 3
Switchery
iOS 7 style switches for your checkboxes
Jquery Tokeninput
Tokeninput is a jQuery plugin which allows your users to select multiple items from a predefined list, using autocompletion as they type to find each item. You may have seen a similar type of text entry when filling in the recipients field sending messages on facebook.
jQuery Smart Auto Complete
AutoComplete plugin with smart defaults and flexibility to customize
Webuploader
It's a new file uploader solution!
Selectize.js
Selectize is the hybrid of a textbox and <select> box. It's jQuery based and it has autocomplete and native-feeling keyboard navigation; useful for tagging, contact lists, etc.
Zxcvbn
zxcvbn, named after a crappy password, is a JavaScript password strength estimation library. Use it to implement a custom strength bar on a signup form near you!
jQuery Timepicker
Adds a timepicker to jQueryUI Datepicker
Mailcheck
Email domain spelling suggester
Colorpicker
jQuery UI widget for color picking (similar to the one in Microsoft Office 2010).
X Editable
In-place editing with Twitter Bootstrap, jQuery UI or pure jQuery
Datedropper
datedropper is a jQuery plugin that provides a quick and easy way to manage dates for input fields.