Zxcvbn
zxcvbn, named after a crappy password, is a JavaScript password strength estimation library. Use it to implement a custom strength bar on a signup form near you!
Nod
jQuery plugin that gives you frontend validation for forms.
Zen Form
Add distraction mode for forms
At.js
Add Github like mentions autocomplete to your application.
Color Picker
React ColorPicker
Validetta
A tiny jquery plugin for validate your forms
Pretty Checkable
A jQuery plugin to replace checkboxes and radios for custom images
Jquery Tokeninput
Tokeninput is a jQuery plugin which allows your users to select multiple items from a predefined list, using autocompletion as they type to find each item. You may have seen a similar type of text entry when filling in the recipients field sending messages on facebook.
Validatr
Cross Browser HTML5 Form Validation.
Starability
Accessible rating forms with cute animations on top.
Completely
A fresh take on autocompletion for a wonderful user experience
Unform
Performance-focused API for React forms 🚀
T Former.js
tFormer.js - Empower your HTML forms
X Sound
XSound gives Web Developers Powerful Audio Features Easily !
Signal R
Incredibly simple real-time web for .NET
G2 Plot
:dango: An interactive and responsive charting library