jQuery Super Labels
Give your forms a helping of awesome!
T Former.js
tFormer.js - Empower your HTML forms
Selectize.js
Selectize is the hybrid of a textbox and <select> box. It's jQuery based and it has autocomplete and native-feeling keyboard navigation; useful for tagging, contact lists, etc.
Validate.js
Lightweight JavaScript form validation library inspired by CodeIgniter.
Progression.js
A jQuery plugin that gives users real time hints & progress updates as they complete forms
Hide Show Password
Because life's too short to waste time re-typing passwords.
Inputex
A javascript framework for YUI to build fields and forms.
Really Simple Color Picker
Simple Color Picker written in jQuery.
jQuery Smart Auto Complete
AutoComplete plugin with smart defaults and flexibility to customize
Sc Editor
A lightweight HTML and BBCode WYSIWYG editor
J Query Mask Plugin
A jQuery Plugin to make masks on form fields and HTML elements.
Tus Jquery Client
A jquery plugin implementing the tus resumable upload protocol.
Expanding Textareas
jQuery plugin for elegant expanding textareas
Filereader.js
A lightweight wrapper for the JavaScript FileReader interface
Validatr
Cross Browser HTML5 Form Validation.
H5F
A JavaScript library that allows you to use the HTML5 Forms chapters new field input types, attributes and constraint validation API in non-supporting browsers.
jQuery Validation
jQuery Validation Plugin