Automatic Infinite Carousel is a Javascript library for jQuery that allows you to create an image carousel.
You can find the tutorial here.
Next time you forget how to write the jQuery document ready function, here is a snippet that can help you. Just put jquery document ready at Google and find the result.
$(document).ready(function() {
// put your jquery stuff here
});
You can download the latest version of jQuery from here.

This interactive jQuery timeline scroller is built on jQuery. Useful for timeline effects, check out the demo.

Swith Display Options is a jQuery library that allows to switch the view in a List. You can easily toggle betweek list type or icons type. See an example here.

jGrowl is a jQuery library that enables unobtrusive message within browser. The messages are similar to those displayed with X’s Growl Framework. Check out these examples.

simpleScroll. This jQuery library allows to create image scroller effect with images and/or HTML.

Flip is a jQuery plugin that flip your elements in four directions.

You can use jQuery Textarea Resizer plugin to create a dynamic height for textarea controls in web pages. Thsi makes possible to resize the textarea control by moving a handle. So, the user can control the Textarea height for its own convenience.

jCarousel is a library for jQuery that allows to create impressive Carousel Effects.
Check out the demos.