jQuery Flash Plugin
A jQuery plugin for embedding Flash movies.

Features
Simple, but powerful.
Specify what you need, and nothing more -- sensible defaults take care of the rest.

$('#hello').flash({
          src: 'hello.swf',
          width: 320,
          height: 240
      });

For a recent client project, we wanted to be able to turn a list of YouTube links into a playlist.  This would allow the client to manage their videos on YouTube and simply insert links to the videos on their site.  With javascript enabled a nice playlist is created, whilst without javasript the user gets a regular list of links to youtube pages.

jQTouch JQuery plugin for mobile web development on the iPhone, Android, Palm Pre, and other forward-thinking devices.

It comes with native animations, automatic navigation, and themes for mobile WebKit browsers like iPhone, G1, and Pre.

Features:
Easy Setup
Native WebKit Animations
Image Preloading
Callback Events
Flexible Themes
MIT Licensed
Swipe Detection

QuickFlip jQuery Plugin

QuickFlip is a jQuery plugin that uses a CSS trick to cause a div, paragraph or any other piece of HTML markup to flip like a card. With a result similar to the UI animation on the iPhone, this jQuery plugin is easily integrated into your webpage to make any portion appear to flip and show its back.

How QuickFlip works
Normally QuickFlip uses two panels: a front and a back. When a flip occurs, the front panel is split in half with Javascript. The right and left halves slide into one another, and afterwards the opposite occurs with the back panel. While it’s not as smooth as some Flash animation, it all happens so quickly that it really looks like the panel is flipping over.