Scriptable Headless WebKit
Super simple WYSIWYG editor
The official jQuery user interface library.
Cleave.js has a simple purpose: to help you format input text content automatically.
Filament is a real-time physically based rendering engine for Android, iOS, Windows, Linux, macOS and WASM/WebGL
Jade - robust, elegant, feature rich template engine for nodejs
BootstrapVue provides one of the most comprehensive implementations of Bootstrap 4 components and grid system for Vue.js and with extensive and automated WAI-ARIA accessibility markup.
Lightweight, robust, elegant syntax highlighting. A spin-off project from Dabblet.
Ajax with less suck - (and node.js HTTP client to match)
MJML: the only framework that makes responsive-email easy
Dropzone is an easy to use drag'n'drop library. It supports image previews and shows nice progress bars.
Full-sized drag & drop event calendar (jQuery plugin)