Rome
Customizable date (and time) picker. Opt-in UI, no jQuery!
Lightslider
JQuery lightSlider is a lightweight responsive Content slider with carousel thumbnails navigation
Easy Pie Chart
Lightweight jQuery plugin to render simple, animated and retina ready pie charts with the HTML5 canvas element
Caman Js
Pure Javascript HTML5 (Ca)nvas (Man)ipulation
Mark.js
JavaScript keyword highlighting. Mark text with options for diacritics, synonyms, custom elements, custom class names, separate word search (multiple terms), filter selectors, accuracy and iframes. Also available as jQuery plugin. Compatible with DataTables.
Chaplin
An Application Architecture Using Backbone.js
Enyo
A JavaScript application framework emphasizing modularity and encapsulation
Jquery Mockjax
The jQuery Mockjax Plugin provides a simple and extremely flexible interface for mocking or simulating ajax requests and responses
Jstat
JavaScript Statistical Library
Keyboard Js
A JavaScript library for binding keyboard combos without the pain of key codes and key combo conflicts.
Sequence
The Responsive Slider with Advanced CSS3 Transitions
Angularjs Slider
Slider directive for AngularJS. No dependencies and mobile friendly.
Cerebral
A state controller with its own debugger
Backgrid
Finally, an easily stylable semantic HTML data grid widget with a Javascript API that doesn't suck.
Intense Images
A simple library to view large images up close using simple mouse interaction, and the full screen.
Enquire.js
Awesome Media Queries in JavaScript
Unveil
A very lightweight jQuery plugin to lazy load images