Probability.js
Probability.js makes it easy to call JavaScript functions by probability in Node.js and the browser.
Objgrep
Find strings inside complicated javascript objects
Communist
JavaScript library for web workers.
Goodnight
A super small Javascript plugin for applying CSS styles at night.
Cutter.js
Truncate HTML code to limit its length by number of words without losing markup.
Idle.js
Javascript activity library for the browser. (away, idle, etc)
Purl
A JS utility for for parsing URLs and extracting information out of them.
Css Console
cssConsole is a jquery plugin that allows you to transform DOM element into console/terminal like input.
React Decoration
A collection of decorators for React Components
Wordcount.js
Calculate file newlines, word, and byte counts on client side using HTML5 File API. (Emulates Linux's wc command)
React Translated
A dead simple way to add complex translations (i18n) in a React (DOM/Native) project 🌎🌍🌏
Gitdown
GitHub markdown preprocessor.
Natural Regex
Create regex from natural language
Impress.js
It's a presentation framework based on the power of CSS3 transforms and transitions in modern browsers and inspired by the idea behind prezi.com.
Timer.js
Timer.js is a periodic timer for Node.js and the browser.
Dropbox JS
JavaScript client library for the Dropbox API
Stratifiedjs
Oni StratifiedJS (previously Apollo)