Grunt
Grunt: The JavaScript Task Runner
Forerunner Db
A JavaScript database with mongo-like query language, data-binding support, runs in the browser as a client-side DB or on the server via Node.js!
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).
Angular Js Boilerplate
Simple AngularJS Boilerplate to kick start your new project with SASS support and Gulp watch/build tasks
Batman
Fighting Crime and Kicking Apps
Onepage Scroll
Create an Apple-like one page scroller website (iPhone 5S website) with One Page Scroll plugin
Wow
Reveal CSS animation as you scroll down a page
Underscore String
String manipulation extensions for Underscore.js javascript library.
Prefixfree
Break free from CSS prefix hell!
Pikaday
A refreshing JavaScript Datepicker — lightweight, no dependencies, modular CSS
Pep
Pep, a lightweight jQuery plugin for kinetic drag on mobile/desktop
Lightslider
JQuery lightSlider is a lightweight responsive Content slider with carousel thumbnails navigation
Bootbox
Wrappers for JavaScript alert(), confirm() and other flexible dialogs using Twitter's bootstrap framework
Bacon.js
FRP (functional reactive programming) library for Javascript
Alpaca
Easy HTML5 Forms for jQuery
Uranium
Universal css-in-js media queries for React Native and React
Beerslider
A vanilla JS keyboard accessible plugin for any before-after comparison