Garlic.js
Garlic.js allows you to automatically persist your forms' text and select field values locally, until the form is submitted. This way, your users don't lose any precious data if they accidentally close their tab or browser.
Progression.js
A jQuery plugin that gives users real time hints & progress updates as they complete forms
Mailcheck
Email domain spelling suggester
Formbuilder
[Needs Maintainer] Formbuilder is a small graphical interface for letting users build their own webforms.
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.
Angular Datepicker
calendar and datepicker directives for angular
Angular Validation
Customizing Form Valid Message in AngularJS
Forms Angular
Probably the most opinionated framework in the world
Darken
🌑 Dark mode made easy
Starability
Accessible rating forms with cute animations on top.
jQuery Autotab
A jQuery plugin that provides auto tabbing and filtering on text fields in a form
Unform
Performance-focused API for React forms 🚀
Fort.js
Modern progress bar for form completion.