Turbolinks
Turbolinks makes navigating your web application faster
Dragula
:ok_hand: Drag and drop so simple it hurts
React Virtualized
React components for efficiently rendering large lists and tabular data
Tether
A positioning engine to make overlays, tooltips and dropdowns better #hubspot-open-source
Eqcss
EQCSS is a plugin that introduces Element Queries, Scoped CSS, a Parent selector, and responsive JavaScript to all browsers IE8 and up
Nested
Gap free multi column grid
Enquire.js
Awesome Media Queries in JavaScript
Vue Js Modal
:pizza: Simple to use, highly customizable, mobile friendly Vue.js 2.0+ modal.
Bespoke.js
DIY Presentation Micro-Framework
Interact.js
Drag and drop, resizing and multi-touch gestures with inertia and snapping for modern browsers (and also IE8+)
Aurora
Hate Cookies? Introducing Aurora, 100% Cookie-Free Open Website Analytics. Collect Anonymous Data. Make your Audience Happy Now!
Phantomjs
Scriptable Headless WebKit
Laconic
Sane DOM Generation
jQuery Evergreen
Small & fast DOM and event library for modern browsers.
Gator
Event delegation in Javascript
Cortex
A javascript library for centrally managing data with React
Vissense
A utility library for observing visibility changes of DOM elements.