Autosize
jQuery plugin for dynamic textarea sizing
Pikaday
A refreshing JavaScript Datepicker — lightweight, no dependencies, modular CSS
Mailcheck
Email domain spelling suggester
jQuery Textcomplete
Introduce autocompleting power to textareas, like GitHub comment forms have.
Cleave.js
Cleave.js has a simple purpose: to help you format input text content automatically.
jQuery Timepicker
Adds a timepicker to jQueryUI Datepicker
X Editable
In-place editing with Twitter Bootstrap, jQuery UI or pure jQuery
Validate.js
Lightweight JavaScript form validation library inspired by CodeIgniter.
Darken
🌑 Dark mode made easy
Form
jQuery Form Plugin
Behave.js
A lightweight, cross browser library for adding IDE style behaviors to plain text areas
Content Tools
A JS library for building WYSIWYG editors for HTML content.
Fort.js
Modern progress bar for form completion.