In the last few months, I'm working on a new side project Muil.
Muil is a powerful service to build email, PDF and image templates using React, then generate via a simple REST API.
I'm sure you know how challenging building transactional email templates can be, you have to write a tangle of archaic HTML and inline styles and there is no easy way to share code and style.
With Muil you can build templates with React and all other libraries you already working with. You can also use shared components and styles from your web client.
Whilst it's still early days, the service core functionality is ready and I receive great feedback and high satisfaction rating from users.
I'd love your feedback, experience, and thoughts!
Getting Started Guide