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.
Accessible rating forms with cute animations on top.
Editable Text Component for React Apps
jQuery plugin for dynamic textarea sizing
A jQuery plugin that provides auto tabbing and filtering on text fields in a form
Cross Browser HTML5 Form Validation.
In-place editing with Twitter Bootstrap, jQuery UI or pure jQuery
The missing components for your favorite front-end framework.
tFormer.js - Empower your HTML forms
Add distraction mode for forms
Gmail-like client-side drafts and bit more. Plugin developed to save html forms data to LocalStorage to restore them after browser crashes, tabs closings and other disasters.