Free JavaScript Library Scripts

script.aculo.us

script.aculo.us provides you with easy-to-use, cross-browser user interface JavaScript libraries to make your web sites and web applications fly. script.aculo.us is a set of JavaScript libraries to enhance the user interface of web sites. It provides an visual effects engine, a drag and drop library (including sortable lists), a couple of controls (Ajax-based autocompletion, in-place editing, sliders) and more.

jQuery

jQueryis a new kind of JavaScript Library. jQuery is a fast and concise JavaScript Library that simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development. jQuery is designed to change the way that you write JavaScript.

Ext JS

Ext JS is a JavaScript platform for rapid development of cross-browser web apps. Ext JS helps you build sustainable applications faster than ever. Develop amazing web apps built on web standards.

Scripty2

Scripty2 is a powerful, flexible JavaScript framework to help you write your own delicious visual effects & user interfaces.

MochiKit

MochiKit is a highly documented and well tested, suite of JavaScript libraries that will help you get shit done, fast. We took all the good ideas we could find from our Python, Objective-C, etc. experience and adapted it to the crazy world of JavaScript.

MooTools

MooTools is a compact, modular, Object-Oriented JavaScript framework designed for the intermediate to advanced JavaScript developer. It allows you to write powerful, flexible, and cross-browser code with its elegant, well documented, and coherent API. MooTools code respects strict standards and doesn’t throw any warnings. It’s extensively documented and has meaningful variable names: a joy to browse and a snap to understand.

YUI

YUI Library is a set of utilities and controls, written with JavaScript and CSS, for building richly interactive web applications using techniques such as DOM scripting, DHTML and AJAX. YUI is proven, scalable, fast, and robust. Built by frontend engineers at Yahoo! and contributors from around the world, it’s an industrial-strength JavaScript library for professionals who love JavaScript.

Prototype

Prototype is a JavaScript Framework that aims to ease development of dynamic web applications. Featuring a unique, easy-to-use toolkit for class-driven development and the nicest Ajax library around, Prototype is quickly becoming the codebase of choice for web application developers everywhere.

Rico

Rico is an open source JavaScript library for developing rich Internet applications (RIAs) that use Ajax. Rico uses the Prototype Javascript Framework and JSON libraries.

Dojo

Dojo is an Open Source DHTML toolkit written in JavaScript. It builds on several contributed code bases (nWidgets, Burstlib, f(m)), which is why we refer to it sometimes as a “unified” toolkit. Dojo aims to solve some long-standing historical problems with DHTML which prevented mass adoption of dynamic web application development.

AJS

AJS is a ultra lightweight JavaScript library that is around 2 years old. It is inspired by MochiKit, but differs by being small and expressive. The current version is only 33 KB (uncompressed!), whereas MochiKit and other libraries such as JQuery, Mootools or Prototype is over/around 100 KB

Raphael

Raphaël is a small JavaScript library that should simplify your work with vector graphics on the web. If you want to create your own specific chart or image crop and rotate widget, for example, you can achieve it simply and easily with this library.

Sizzle

Sizzle is a pure-JavaScript CSS selector engine designed to be easily dropped in to a host library.

PaintbrushJS

PaintbrushJS is a lightweight browser-based image processing library built with Javascript and canvas.