Videobox is a 6kb script, which shows your videos in the page with an overlay.

Allows you to turn any div, textarea or pre tag into a simple Code viewer.

mxGraph is the ultimate solution for drawing diagrams in a browser. just works!

Expands to fit any layout and scales nicely with big and small font sizes.

GoogieSpell is a spell checker that you can use in your own web-application

A feature rich, easy to integrate spinner control for your form inputs.

The Splitter can do both vertical and horizontal splitting. Very easy to use.

The Spry framework for Ajax is a JavaScript library for web designers.

filmed.js allows you to add film strip and shadow to images on your webpages.

Uses the XMLHTTPRequest object to send and receive commands to and from the server.

Allows you to translate any text on a page using Google’s translation service.

A jQuery plugin that Enables semi transparent rollovers (works in IE6).

A jQuery plugin to provide some functionality to add corners to html elements.

Create a nice expanding and collapsing tree view control using jQuery.

Technology that allows you to replace text elements on screen with Flash equivalents

Big players embracing the need for open standards - thus stimulating innovation.

Adding Undo to your interfaces profoundly and positively affects usability of your site.

Nice and simple to use code snippet to use ajax for validating unique user names.

Users can navigate through their action history and undo their actions at any time.

jQuery is designed to change the way that you write JavaScript.

provided with the full download of moofx, to use its ajax capabilities along with the effects.

moo.fx is a superlightweight, ultratiny, megasmall javascript effects library,

18 market leading UI and data controls with proven reliability.

A cross-browser implementation of the WHATWG Web Forms 2.0 specification.

Provides a user interface for easy file management of a directory on the server.

Set of themable widgets that you can use to build highly interactive web apps.

This is a cross browser DHTML window script with support for tabs.

A jquery plugin that will emulate a step by step wizard like the windows wizard.

Allows you to turn any textarea tag into a quick tag editor in an inobtrusive manner.

You don’t have to click to open one item, you just move your mouse over it.

A fully functional in-Dialog AutoComplete using the Yahoo UI library.

DHTML Goodies, An updated and extensive library of DHTML and Ajax scripts.

Can now specify action of toggling each accordion element, without closing others.

An accordion implementation which also features drag/drop functionality.

Spiffy lets developers create rich internet websites the right way.

Simple way to accomplish blade interface on xbox 360 with javascript and css.

This is one of the smallest accordion you can find on the web 1149 Bytes.

An open source unobtrusive javascript tool for easy handling form validation and input masking.

Supports unobtrusive conversion of standard markup into rich media content.

The cool hover effect is what gives it character. Take a look, you might like it.

You never need to see a page refresh even though the data is from the database.

MochiKit is a highly documented and well tested, suite of JavaScript libraries.

We’ve all gone through the pain of uploading dozens of files, one at a time. Since sites like Facebook have started to popularize multiple file upload and client side image compression, our clients have started to nag for the same features. So we took it upon ourselves to find a couple of similar multiple image [...]

The autocomplete is certainly one of the most seen and used AJAX scripts, however, there are still a few twists and tricks that may be used to spice usability and appearance. Have a look at the following great scripts:

Search Autocomplete - .NET

Yet another AutoComplete

Autocomplete - jQuery

dhtmlxCombo + Autocomplete

AutoComplete - JQuery

AutoSuggest