Quovolver is a free jQuery plugin for displaying quotes, testimonials or comments on a website nicely and easily.

It simply takes a list of HTML content from any HTML tag mentioned (can be <li>, <blockquote>, etc.) and rotates them.

There are very things to setup like the HTML tag that wraps the items, the speed of the animation and duration between the transitions.

jQuery Webcam is a plugin which creates a transparent layer for communicating with a camera directly in JavaScript.

It takes advantage of a SWF file (comes with the source) and can display the webcam output + capture images.

The plugin is capable of displaying the list of cameras available and selecting any of them.

Video to be streamed can be any size (however, this can require a recompile of the SWF file which is described in the documentation).

jQuery Ajaxy is a plugin which enables us to convert a standard website into an Ajaxed one with no hassles.

It has built-in support for URL hash changes, AJAX form submits or AJAX links.

The usage of the plugin is so easy: the ordinary links and forms are upgraded into Ajax requests by just adding a CSS classname.

As the URL addresses change on every request, users can browse with browser back-forward buttons and URLs will stay SEO-friendly.

The plugin also gives the ability to control your web applications state manually through your code for advanced circumstances.

carouFredSel is a jQuery plugin that converts any kind of HTML element into an infinite and circular carousel.

It can scroll one or more items at the same time both horizontally or vertically.

Every item can be displayed automatically and/or by user interaction (pressing buttons or keys on the keyboard).

The plugin works with items in different width-heights and it is compatible with most of the jQuery lightbox plugins.

It is possible to add/remove items from the carousel dynamically, play, pause or control the prev-next items using custom events and manage it at every level with the callbacks provided.

EditableGrid is a JavaScript library which can make standard HTML tables editable and sortable.

It can feed from a XML file or attached to an existing HTML table.

The library automatically enables users to edit cells with a suitable editor like textfields, checkbox, etc. and comes with built-in validators (integer, double, URL, e-mail and date).

Once a column header is clicked, the rows are sorted according to their types and up/down arrows show whether the sort is ascending or descending.

There is a PHP binding provided for building the grid and generating the XML.

And, another nice feature is the optional integration with Open Flash Chart for rendering charts from the grid data automatically.

In order to improve + customize EditableGrid, there are callbacks provided on every event.

Orbit is a lightweight (2.8kb compressed) jQuery plugin for displaying multiple images in a limited space.

The HTML markup is pretty clean, just an element that wraps multiple images where the captions are generated from the title tags of these images.

Images can be browsed using the prev-next buttons which appear on hover and there is an optional timer letting the user know when the next image will be displayed.

This easy-to-use plugin has several options like the animation type, animation speed, enable/disable previous-next buttons, captions, timer and more.

canvasXpress is a free JavaScript graphing library based on the <canvas> tag of HTML5.

It supports multiple graph types including bar, line, dotplots, area, stacked, heatmaps, pie charts and more.

The outputs are interactive as hovering over the items can display values.

And, it is possible to customize every aspect of them including colors, text, hiding/showing elements, etc.

canvasXpress works in all major browsers including IE6.

PaintbrushJS is a JavaScript library for applying effect to images on the client-side.

It makes use of the canvas element and works by applying a class to an element on the web page and setting few parameters with some extra HTML attributes.

The filters it supports currently are: blur, grayscale, mosaic, noise, posterize, sepia and tint.

Touch Gallery is a jQuery image gallery plugin which brings the native look and feel of native photo-viewing applications to the mobile browsers.

It supports browsing through the images with gestures and also works with desktop browsers with limited functionality.

The gallery depends on two other plugins: transform and activity-indicator where both is included in the download package.

Selectivizr is a JavaScript library that emulates CSS3 pseudo-classes and attribute selectors in Internet Explorer 6-8.

Once included in web pages, rest is done automatically.

The library requires a JavaScript framework to run and many popular ones are supported like Query, MooTools, YUI, Dojo, Prototype and more.

And, if there are multiple JS frameworks inserted in the web page, Selectivizr chooses the most suitable one for the job.