Tilt.js
A tiny 60+fps parallax tilt hover effect for jQuery.
Sound Manager 2
A JavaScript Sound API supporting MP3, MPEG4 and HTML5 audio + (experimental) RTMP, providing reliable cross-browser/platform audio control in as little as 10 KB. BSD licensed.
Polychart2
Version 2 of Polychart.js
Plyr
A simple HTML5, YouTube and Vimeo player
Morpheus
A Brilliant Animator
Kerning.js
Take control of your web typography.
Highlight.js
Javascript syntax highlighter
Fine Uploader
Multiple file upload plugin with progress-bar, drag-and-drop.
Device.js
Device.js makes it easy to write conditional CSS and/or JavaScript based on device operating system (iOS, Android, Blackberry, Windows, Firefox OS), orientation (Portrait vs. Landscape), and type (Tablet vs. Mobile).
Backbone Relational
Get and set relations (one-to-one, one-to-many, many-to-one) for Backbone models
Angular.js
AngularJS lets you write client-side web applications as if you had a smarter browser. It lets use good old HTML (or HAML, Jade and friends!) as your template language and lets you extend HTML’s syntax to express your application’s components clearly and succinctly
Tire
Tire is a lightweight JavaScript library for modern browsers
Grips
Simple-logic templates
Blizzard.js
A promise-based Node.JS library for the Blizzard Battle.net Community Platform API
Beerslider
A vanilla JS keyboard accessible plugin for any before-after comparison
Tau Charts
D3 based data-focused charting library. Designed with passion. Flexible.
Progressbar.js
Beautiful and responsive progress bars