Completely
A fresh take on autocompletion for a wonderful user experience
Inputex
A javascript framework for YUI to build fields and forms.
Zen Form
Add distraction mode for forms
Formvalidation
The best @jquery plugin to validate form fields. Designed to use with Bootstrap + Zurb Foundation + Pure + Semantic UI + UIKit + Your own frameworks. Star it. Try it. Buy it :)
Webuploader
It's a new file uploader solution!
J Query Mask Plugin
A jQuery Plugin to make masks on form fields and HTML elements.
X Editable
In-place editing with Twitter Bootstrap, jQuery UI or pure jQuery
Form
jQuery Form Plugin
Tus Jquery Client
A jquery plugin implementing the tus resumable upload protocol.
Parsley.js
Validate your forms, frontend, without writting a single line of javascript!
jQuery Validation
jQuery Validation Plugin
Jasny Bootstrap
The missing components for your favorite front-end framework.
jQuery Textcomplete
Introduce autocompleting power to textareas, like GitHub comment forms have.
Pickadate.js
lightweight jquery date selector with multi-language support
Jquery Tokeninput
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.
Cleave.js
Cleave.js has a simple purpose: to help you format input text content automatically.
Starability
Accessible rating forms with cute animations on top.