Gridster.js
gridster.js is a jQuery plugin that makes building intuitive draggable layouts from elements spanning multiple columns
Backbone Deep Model
Improved support for models with nested attributes.
Crossfilter
Fast n-dimensional filtering and grouping of records.
Dc.js
Multi-Dimensional charting built to work natively with crossfilter rendered with d3.js
Responsive Comments
A client-side solution to conditional loading.
Transparency
Transparency is a semantic template engine for the browser. It maps JSON objects to DOM elements by id, class and data-bind attributes.
Scroll Nav
A jQuery plugin for building a scrolling navigation menu
Bespoke.js
DIY Presentation Micro-Framework
Offline
Automatically display online/offline indication to your users. #hubspot-open-source
Onepage Scroll
Create an Apple-like one page scroller website (iPhone 5S website) with One Page Scroll plugin
Validetta
A tiny jquery plugin for validate your forms
Absurd
Writing your CSS in JavaScript. That's it!
Resumable.js
A JavaScript library for providing multiple simultaneous, stable, fault-tolerant and resumable/restartable uploads via the HTML5 File API.
Protractor
E2E test framework for Angular apps
Bonzo
library agnostic, extensible DOM utility
Blanket
blanket.js is a simple code coverage library for javascript. Designed to be easy to install and use, for both browser and nodejs.
Bacon.js
FRP (functional reactive programming) library for Javascript