Enquire.js
Awesome Media Queries in JavaScript
Vue Js Modal
:pizza: Simple to use, highly customizable, mobile friendly Vue.js 2.0+ modal.
Tether
A positioning engine to make overlays, tooltips and dropdowns better #hubspot-open-source
Isotope
An exquisite jQuery plugin for magical layouts. Enables filtering, sorting, and dynamic layouts.
Gliojs
Exit popup easely. Detects if the mouse of a user leaves the viewport borders of your website
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+)
Prefixfree
Break free from CSS prefix hell!
Masonry
Layout elements in a grid, like a mason fitting stones in a wall
Bind.js
bind.js - simple two way data binding to HTML and callbacks
Aurora
Hate Cookies? Introducing Aurora, 100% Cookie-Free Open Website Analytics. Collect Anonymous Data. Make your Audience Happy Now!
Keyboard Js
A JavaScript library for binding keyboard combos without the pain of key codes and key combo conflicts.
Phantomjs
Scriptable Headless WebKit
jScrollPane
Pretty, customisable, cross browser replacement scrollbars
Laconic
Sane DOM Generation
Gator
Event delegation in Javascript
jQuery Evergreen
Small & fast DOM and event library for modern browsers.