Zepto
Zepto.js is a minimalist JavaScript library for modern browsers, with a jQuery-compatible API
Mootools Core
MooTools Core Repository
React Virtualized
React components for efficiently rendering large lists and tabular data
Fragment.js
A tiny tool for easily loading html fragments and templates
Viewport
Gets the dimensions of the Viewport and beyond.
Rando.js
The world's easiest, most powerful random function.
Porthole
A proxy to safely communicate to cross-domain iframes in javascript
Bind.js
bind.js - simple two way data binding to HTML and callbacks
Design Blocks
A set of 170+ Bootstrap based design blocks ready to be used to create clean modern websites.
Nested
Gap free multi column grid
Turbolinks
Turbolinks makes navigating your web application faster
Enquire.js
Awesome Media Queries in JavaScript
Vue Js Modal
:pizza: Simple to use, highly customizable, mobile friendly Vue.js 2.0+ modal.
Gliojs
Exit popup easely. Detects if the mouse of a user leaves the viewport borders of your website
Tether
A positioning engine to make overlays, tooltips and dropdowns better #hubspot-open-source
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+)