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
Adapt.js serves CSS based on screen width.
A service for your website that makes it surprisingly easy to collaborate in real-time.
Modern HTML Presentations
A JS utility for for parsing URLs and extracting information out of them.
A jQuery / Zepto plugin for easily setting up A/B and Multivariate tests using Analytics.
A tiny wrapper for the HTML5 Battery Status API.
:airplane: Kickstarting the Offline-First Revolution
Automatically display online/offline indication to your users. #hubspot-open-source
Oni StratifiedJS (previously Apollo)
AnyPixel.js is an open-source software and hardware library that makes it possible to use the web to create big, unusual, interactive displays.
ES2015 template literal tag for i18n and l10n (translation and internationalization)