Zepto
Zepto.js is a minimalist JavaScript library for modern browsers, with a jQuery-compatible API
Fragment.js
A tiny tool for easily loading html fragments and templates
Html
A simple, extensible way to work directly with the DOM.
React Virtualized
React components for efficiently rendering large lists and tabular data
Rando.js
The world's easiest, most powerful random function.
Bind.js
bind.js - simple two way data binding to HTML and callbacks
Nested
Gap free multi column grid
Enquire.js
Awesome Media Queries in JavaScript
Tether
A positioning engine to make overlays, tooltips and dropdowns better #hubspot-open-source
Vue Js Modal
:pizza: Simple to use, highly customizable, mobile friendly Vue.js 2.0+ modal.
Mootools Core
MooTools Core Repository
Dragula
:ok_hand: Drag and drop so simple it hurts
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+)
Aurora
Hate Cookies? Introducing Aurora, 100% Cookie-Free Open Website Analytics. Collect Anonymous Data. Make your Audience Happy Now!
Masonry
Layout elements in a grid, like a mason fitting stones in a wall