Form

Tokeninput is a jQuery plugin which allows your users to select multiple items from a predefined list, using autocompletion as they type to find each item. You may have seen a similar type of text entry when filling in the recipients field sending messages on facebook.   Tokeninput - Features: Intuitive UI for selecting multiple items from a large list Easy to skin/style purely in css, no images required Supports any backend which can generate JSON, including PHP, Rails, Django, ASP.net Sm

Ideal Forms is the ultimate framework for building and validating responsive HTML5 forms.   Ideal Forms - Features: On the spot validation Fully adaptive (adapts to the container, no css media queries needed) Keyboard support Custom checkboxes, radios and file inputs Custom seamless jQuery UI datepicker Support for third party extensions Localization  

Pliant is a jQuery plugin for form validation, that tries to be very flexible as far as validation rules are concerned. It also allows defining rules via HTML comments. Pliant - Features: Central, or field specific rule definitions. Rule inheritance and property overriding. Validation on field change. Field/Rule validation chaining. Apply validation on init, after init, or via HTML comments. Control field/rule message locations globally, or per field/rule instance. Control the form valid

Fancyfields.js is a jQuery plugin for custom form elements. With Fancy field it's easy to customize your web forms to look like a million dollars.  

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.  

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  

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.   

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.  

Autosize is a Small jQuery plugin to allow dynamic resizing of textarea height, so that it grows as based on visitor input. To use, just call the .autosize() method on any textarea element. Ex: $("textarea").autosize();  

Bootstrap Dual Listbox is a responsive dual listbox widget optimized for Twitter Bootstrap. It works on all modern browsers and on touch devices.