T Former.js
tFormer.js - Empower your HTML forms
At.js
Add Github like mentions autocomplete to your application.
Fancy Input
Makes typing in input fields fun with CSS3 effects
Zen Form
Add distraction mode for forms
Validetta
A tiny jquery plugin for validate your forms
Idealforms
The ultimate framework for building and validating responsive HTML5 forms.
Unform
Performance-focused API for React forms 🚀
Taggle.js
Form-ready dependency-less tagging.
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.
Tus Jquery Client
A jquery plugin implementing the tus resumable upload protocol.
Switchery
iOS 7 style switches for your checkboxes
Resumable.js
A JavaScript library for providing multiple simultaneous, stable, fault-tolerant and resumable/restartable uploads via the HTML5 File API.
G2 Plot
:dango: An interactive and responsive charting library
Validatr
Cross Browser HTML5 Form Validation.
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 :)