Headstart
An automated front-end setup
Behave.js
A lightweight, cross browser library for adding IDE style behaviors to plain text areas
Messenger
Growl-style alerts and messages for your app. #hubspot-open-source
Material2
Material Design components for Angular
Sinon.js
Test spies, stubs and mocks for JavaScript.
Mithril.js
A Javascript Framework for Building Brilliant Applications
Cerebral
A state controller with its own debugger
Editor
Next-gen, highly customizable content editor for the browser - based on React and Redux. WYSIWYG on steroids.
Jq Tree
Tree widget for jQuery
React Joyride
Create walkthroughs and guided tours for your app
jQuery IME
jQuery based input methods library
Tabletop
Tabletop.js gives spreadsheets legs
ICanHaz.js
A clean solution for templating with Mustache.js and jQuery or Zepto
JS xls
Javascript XLS (Excel 97-2004 spreadsheet) parser and (one day) writer
Reseter.css
Reseter.css - A Futuristic Alternative To Normalize.css And CSS Resets
Express
Sinatra inspired web development framework for node.js -- insanely fast, flexible, and simple
Brick
UI Web Components for Mobile Web Apps