Pickadate.js
lightweight jquery date selector with multi-language support
Switchery
iOS 7 style switches for your checkboxes
Validatr
Cross Browser HTML5 Form Validation.
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.
Quill
A cross browser rich text editor with an API
G2 Plot
:dango: An interactive and responsive charting library
Mailcheck
Email domain spelling suggester
Unform
Performance-focused API for React forms 🚀
Sapphire Db
SapphireDb Server, a self-hosted, easy to use realtime database for Asp.Net Core and EF Core
Colorpicker
jQuery UI widget for color picking (similar to the one in Microsoft Office 2010).
Darken
🌑 Dark mode made easy
Fort.js
Modern progress bar for form completion.
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.