Quill
A cross browser rich text editor with an API
Alpine
A rugged, minimal framework for composing JavaScript behavior in your markup.
Selectize.js
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.
Filepond
🌊 A flexible and fun JavaScript file upload library
Angular Validation
Customizing Form Valid Message in AngularJS
Tsparticles
tsParticles - Easily create highly customizable particles animations and use them as animated backgrounds for your website. Ready to use components available for React.js, Vue.js (2.x and 3.x), Angular, Svelte, jQuery, Preact, Inferno, Solid, Riot and Web Components.
Form2js
Javascript library for collecting form data
Switchery
iOS 7 style switches for your checkboxes
Unform
Performance-focused API for React forms 🚀
Fancy Input
Makes typing in input fields fun with CSS3 effects
jQuery Autotab
A jQuery plugin that provides auto tabbing and filtering on text fields in a form
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.
Resumable.js
A JavaScript library for providing multiple simultaneous, stable, fault-tolerant and resumable/restartable uploads via the HTML5 File API.
Angular Formly
JavaScript powered forms for AngularJS
Validetta
A tiny jquery plugin for validate your forms
Taggle.js
Form-ready dependency-less tagging.
Multi Select
A user-friendlier drop-in replacement for the standard select with multiple attribute activated.