YUI

An open-source JavaScript and CSS library for building richly interactive web applications.

A lightweight, vanilla JavaScript parallax library.

An ultra lightweight, customizable, simple autocomplete widget with zero dependencies.

A lightweight and flexible script that speeds up your web application by delaying the loading of your below-the-fold images, videos and iframes until they enter the viewport.

Analytics.js

An open-source library that collects customer data and sends it to many different tools using an API from Segment CDP.

Micromodal.js

A tiny JavaScript library for creating accessible modal dialogs.

Dexie.js

A minimalistic wrapper library for IndexedDB.

ScrollMagic

A JavaScript library for magical scroll interactions.

ScrollReveal

A commercial JavaScript library for animating elements as they enter/leave the viewport.

Lenis

A modern, lightweight, and performant open-source smooth scrolling library with WebGL scroll synchronization, parallax effects, and more.

Critters

A deprecated Webpack plugin that inlines your app's critical CSS and lazily loads the rest.

Dragula

A drag and drop library with touch events and no dependencies.

Knockout

A JavaScript MVVM (Model-View-ViewModel) library that helps developers create rich, desktop-like user interfaces with JavaScript and HTML.

Instant.Page

Uses just-in-time preloading - it preloads a page right before a user clicks on it.

Flowplayer

A commercial video player, the older version of which is open source.

Bootstrap Table

An advanced table with radio, checkboxes, sorting, pagination and extensions that supports Bootstrap, Semantic UI, Bulma, Material Design and Foundation.

Air Datepicker

A customizable datepicker written in pure JavaScript without any dependencies.

A component for interactive visualization of geographic data with smooth zooming and panning, fully customizable styling, markers, labels and tooltips.

Orphus

A tiny, zero-configuration library that allows website visitors to report typos on web pages using Ctrl+Enter.

Bootstrap Progressbar

A jQuery plugin that allows you to animate the Bootstrap 2 and 3 progressbar with JavaScript.

Closure Library

A low-level JavaScript library designed for building complex and scalable web applications.

Prefix-free

A legacy script that adds browser prefixes to CSS code when needed for old browsers.

A lightbox library for photos and videos, last released in 2014.

Prism

A lightweight, extensible syntax highlighter that supports nearly 300 languages.

TinyMCE

A JavaScript-based WYSIWYG rich text editor that transforms HTML textarea or designated elements into a full editing interface for web applications.