Parsley - The ultimate javascript form validation library
Beautiful dashboard gauges for the sophisticated developer.
More JavaScript Gauges
jgauge - jGauge is a dial gauge that is simple, powerful, and 100% javascript and css. - Google Project Hosting
JavaScript based analog gauge
Heyoffline.js
Heyoffline.js is a simple tool that prevents your users from this kind of frustration. Written in CoffeeScript and compiled into JavaScript, the library can warn your users when their network goes down so that they don't lose anything. Once JavaScript is loaded, it can react to the loss of connection and change the page accordingly.
jQuery for Designers - Tutorials and screencasts
Great site for webdesigners using jQuery
jQuery UI Development & Planning Wiki / Essential Controls List
jQuery Plugins Toolbox
List of jQuery plugins
TextMate Bundle for jQTouch : Jonathan Stark
Sweeet
jQTouch
AjQuery plugin for mobile web development on the iPhone, iPod Touch, and other forward-thinking devices.
15 Amazing jQuery Image Gallery/Slideshow Plugins and Tutorials
Links to existing packages
Jeditable
Edit In Place Plugin For jQuery