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
justGage.com
Cool JavaScript gauges (SVG)
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
node.js
Node's goal is to provide an easy way to build scalable network programs
Closure Tools - Google Code
Open source JavaScript compiler, debugger, library, and templating system from Google
Jeditable
Edit In Place Plugin For jQuery
Proudly Announcing: Modernizr | FarukAt.eş
Modernizr is a small JavaScript toolkit that uses feature detection techniques to determine whether or not the current browser is capable of any of the following features from CSS3 and HTML5.
Highslide JS
Nice left/right arrow control when zoomed