jQuery TextExt Plugin : TextExt is a plugin for jQuery which is designed to provide functionality such as tag input and autocomplete.
jQuery Google Analytics Custom Events : jQuery GACE is a plugin for tracking custom events in your web page. It provides a simple wrapper for some custom elements.
Morris.js : Morris.js is a lightweight library that uses jQuery and Raphaël to make drawing time-series graphs easy.
Naked Password : jQuery Plugin to Encourage Stronger Passwords
Select2 : Select2 is a jQuery based replacement for select boxes. It supports searching, remote data sets, and infinite scrolling of results.