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.
A lightweight HTML and BBCode WYSIWYG editor
Because life's too short to waste time re-typing passwords.
jQuery UI widget for color picking (similar to the one in Microsoft Office 2010).
Accessible rating forms with cute animations on top.
Probably the most opinionated framework in the world
The missing components for your favorite front-end framework.
The ultimate framework for building and validating responsive HTML5 forms.
Garlic.js allows you to automatically persist your forms' text and select field values locally, until the form is submitted. This way, your users don't lose any precious data if they accidentally close their tab or browser.
Give your forms a helping of awesome!
jQuery Form Plugin
A fresh take on autocompletion for a wonderful user experience
Customizing Form Valid Message in AngularJS