Mailtrain - Self-hosted open-source Mailchimp clone
Letterfuel - Grow your audience with a curated newsletter
Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.
Curated - Grow your audience by sharing truly engaging content weekly
Kill the Newsletter! - Convert newsletters into RSS feeds
Revue - The easiest way to create and send a curated newsletter