Letterfuel is a service that makes it super easy to start a curated newsletter and consistently publish issues.
Buttondown is a simple, powerful tool for building and sending newsletters and emails. I struggled with other tools that were either too complex and expensive or too simple and unwieldy, so I created an alternative: an elegant interface that lets you write and edit quickly while providing all the amenities a modern email app needs.
Taha ahmed khan - Maker at d5Gravity.com
Very simple, they also show various products that they are using to run Buttondown