eCSStender enables developers to patch CSS support in browsers and experiment with new features. It also enables designers to keep browser-specific hacks out of their CSS files. With eCSStender, you can take control of your CSS.  Extensions built with eCSStender greatly simplify the design process because you can author modern CSS using advanced selectors, properties such as border-radius, or custom font faces and rest assured that your design will work... even in IE6.  

Flexigrid, a rich data grid jQuery plugin, has the ability to connect to XML and JSON data by using Ajax to load the content.   Flexigrid - Features: Resizable columns Resizable height and width Sortable column headers Cool theme Can convert an ordinary table Ability to connect to an ajax data source (XML and JSON) Paging Show/hide columns Toolbar (new) Search (new) Accessible API Resizable Width JSON Support Toolbar Table Toggle Button Show/Hide Columns control have been move

dbpasCarousel is another jQuery carousel plugin. This plugin will convert the ul element into a carousel. And you can set the auto generating captions for each slide by using img alt attribute.  

Chained is simple plugin for chained selects. It works with both jQuery and Zepto. You can choose from two different versions. Use class based version if you do not want to make external queries. It uses HTML class names of select options to decide content. To create selects from AJAX queries use remote version instead. This version makes an external AJAX query and uses the returned JSON to build child selects.  

Ion.Tabs is a jQuery tabs plugin that has easy and well done tabs with many options and skin support.   Ion.Tabs - Features: Supports many groups of tabs at one page. Generate events and callbacks. Support many types of position saving, for each tabs group on the page. Very easy in set up and customisation. Has skin support. Has public methods for outside control. Cross-browser support: Google Chrome, Mozilla Firefox, Opera, Safari, IE(8.0+) Ion.Tabs supports touch-devices (iPhone, iPad

DateTimePicker is a jQuery date and time picker plugin. You can use this plugin to unobtrusively add a datetimepicker, datepicker or timepicker dropdown to your forms. It's easy to customize options.   

aToolTip is a simple, lightweight, cross browser compliant and highly customizable tooltip plugin for jQuery.   aToolTip - Features: Lightweight Easy to use Choice of fixed, on click or follow mouse tooltip Highly customizable Compatable with Firefox 2.5+, Safari, Opera, Chrome and Internet Explorer 6, 7 & 8  

xCSS is the first CSS framework that allows you to work object-oriented and keeps your workflow as DRY as possible.   This CSS framework bases on CSS and empowers a straightforward and object-oriented workflow when developing complex style cascades. Using xCSS means a dramatic cut down to your development time by: having a intuitive overview of the overall CSS structure, using variables, re-using existing style cascades and many other handy features. But, most frameworks are bulky and inflexib

Tokenfield is a jQuery tagging / tokenizer input plugin for Twitter's Bootstrap.   Tokenfield - Features: Copy & paste tokens with Ctrl+C and Ctrl+V Keyboard navigation, delete tokens with keyboard (arrow keys, Shift + arrow keys) Select specific tokens with Ctrl + click and Shift + click Twitter Typeahead and jQuery UI Autocomplete support  

jQuery Credit Card Validator detects and validates credit card numbers. It'll tell you the detected credit card type and whether the number length and Luhn checksum are valid for the type of card.