Probability.js
Probability.js makes it easy to call JavaScript functions by probability in Node.js and the browser.
Re Marked.js
Client-side markdown generator
Trip.js
Trip.js is a plugin that can help you customize a tutorial trip easily with more flexibilities. ( Based on jQuery )
Tablesort
:arrow_up_down: A small tablesorter in plain JavaScript
Remark
A simple, in-browser, markdown-driven slideshow tool.
Rule Reactor
A light weight, fast, expressive forward chaining business rule engine leveraging JavaScript internals, lazy cross-products, and Functions as objects rather than Rete. NOTE: The master branch is the front edge of development. If you desire a more tested version, use the npm package.
Outdated Browser
A simple tool to identify and upgrade old browsers.
Purl
A JS utility for for parsing URLs and extracting information out of them.
Angular Socialshare
Angular social share module, share urls and content on social networks such as facebook, google+, twitter, pinterest and so on - http://720kb.github.io/angular-socialshare
Pdfmake
Client/server side PDF printing in pure JavaScript
Offline
Automatically display online/offline indication to your users. #hubspot-open-source
Less.js
Leaner CSS
LeapJS
Javascript library for the Leap motion controller
Humanize
A simple utility library for making the web more humane. #hubspot-open-source
Tfjs Core
WebGL-accelerated ML // linear algebra // automatic differentiation for JavaScript.
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.
Adapt
Adapt.js serves CSS based on screen width.