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.
G2 Plot
:dango: An interactive and responsive charting library
At.js
Add Github like mentions autocomplete to your application.
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!
Alpaca
Easy HTML5 Forms for jQuery
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.
Parsley.js
Validate your forms, frontend, without writting a single line of javascript!
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!
Mailcheck
Email domain spelling suggester
Colorpicker
jQuery UI widget for color picking (similar to the one in Microsoft Office 2010).
Angular Datepicker
calendar and datepicker directives for angular
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.