Packery
bin-packing layout library
jScrollPane
Pretty, customisable, cross browser replacement scrollbars
Kimbo.js
An ECMAScript 5 only-compatible JavaScript library.
Keyboard Js
A JavaScript library for binding keyboard combos without the pain of key codes and key combo conflicts.
Html
A simple, extensible way to work directly with the DOM.
Fragment.js
A tiny tool for easily loading html fragments and templates
Persist State
jQuery Ui widget that will transparently save the state of checkboxes, inputs, selects, etc in localStorage, restoring these on the user's next visit to the page.
Eqcss
EQCSS is a plugin that introduces Element Queries, Scoped CSS, a Parent selector, and responsive JavaScript to all browsers IE8 and up
Gliojs
Exit popup easely. Detects if the mouse of a user leaves the viewport borders of your website
Double
jQuery plugin for hiring doubles
Viewport
Gets the dimensions of the Viewport and beyond.
Tether
A positioning engine to make overlays, tooltips and dropdowns better #hubspot-open-source
Nested
Gap free multi column grid
Turbolinks
Turbolinks makes navigating your web application faster
Node List.js
NodeList implementation/library - Use the Native DOM APIs as easily as jQuery
Isotope
An exquisite jQuery plugin for magical layouts. Enables filtering, sorting, and dynamic layouts.
Resize Observer
Polyfills the ResizeObserver API.