-
novu
GitOps based Notification Infrastructure as Code. Embeddable Notification Center, E-mail, Push and Slack Integrations.
-
SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
It's a great question. I think this is a common issue where on the one you want some customization and templates, and on the other, it is at the end of the day part of a bigger system called notification infrastructure. There is an OS library called Notifire, that addresses both the templating issue, as well as the email providers, as a small plus it makes a unified API. As a disclaimer, I am a maintainer. But I truly hope the solution can help you :)