Leave Me Alone - Easily unsubscribe from unwanted emails 💌
HTMLEmail.io - Responsive HTML email templates for startups & developers
Clean Email - Clean Email is an online service that empowers you to take control of your mailbox.
Templates by Email Monster - Hundreds of free, responsive email templates. Pick and edit.
Unroll.me - A cleaner inbox is just a click away! Unroll.Me gives you the tools you need to manage a cluttered mailbox full of pesky subscriptions emails.
MJML - The open source framework for responsive emails