Magicsuggest
Multiple Selection Combo Box using Bootstrap 3
jQuery Steps
A powerful jQuery wizard plugin that supports accessibility and HTML5.
Datedropper
datedropper is a jQuery plugin that provides a quick and easy way to manage dates for input fields.
Angular Datepicker
calendar and datepicker directives for angular
Angular Validation
Customizing Form Valid Message in AngularJS
Fancy Input
Makes typing in input fields fun with CSS3 effects
Sc Editor
A lightweight HTML and BBCode WYSIWYG editor
Fort.js
Modern progress bar for form completion.
Starability
Accessible rating forms with cute animations on top.
Taggle.js
Form-ready dependency-less tagging.
Forms Angular
Probably the most opinionated framework in the world
jQuery Chained
Chained Selects jQuery plugin.
Behave.js
A lightweight, cross browser library for adding IDE style behaviors to plain text areas
Hide Show Password
Because life's too short to waste time re-typing passwords.
Idealforms
The ultimate framework for building and validating responsive HTML5 forms.
Color Picker
React ColorPicker
Form2js
Javascript library for collecting form data