Sisyphus
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.
Fancy Input
Makes typing in input fields fun with CSS3 effects
Expanding Textareas
jQuery plugin for elegant expanding textareas
Tus Jquery Client
A jquery plugin implementing the tus resumable upload protocol.
Content Tools
A JS library for building WYSIWYG editors for HTML content.
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.
Inputex
A javascript framework for YUI to build fields and forms.
Formvalidation
The best @jquery plugin to validate form fields. Designed to use with Bootstrap + Zurb Foundation + Pure + Semantic UI + UIKit + Your own frameworks. Star it. Try it. Buy it :)
Formbuilder
[Needs Maintainer] Formbuilder is a small graphical interface for letting users build their own webforms.
X Sound
XSound gives Web Developers Powerful Audio Features Easily !
Really Simple Color Picker
Simple Color Picker written in jQuery.
Resumable.js
A JavaScript library for providing multiple simultaneous, stable, fault-tolerant and resumable/restartable uploads via the HTML5 File API.
Pickadate.js
lightweight jquery date selector with multi-language support
Behave.js
A lightweight, cross browser library for adding IDE style behaviors to plain text areas
jQuery Smart Auto Complete
AutoComplete plugin with smart defaults and flexibility to customize
Mailcheck
Email domain spelling suggester