This is a drag & drop email builder plugin based on Jquery and PHP for developer. You can simply integrate this script in your web project and create custom email template with drag & drop.
Demo https://codecanyon.net/item/bal-email-newsletter-builder-php-version/18060733
Downloadhttps://www.filecad.com/e3x6/Bal-v2.0.4---Drag-&-Drop-Email-Template-Builder-for-PHP.rar