Mailtrain - Self-hosted open-source Mailchimp clone
Hacker Newsletter - Best of Hacker News in your inbox every Friday.
Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.
The Chatty Mammoth - The Chatty Mammoth Newsletter helps you fit in more reading:-We find pieces of writing designed to prompt new thoughts, perspectives, and questions-We then summarise each article into <90 words-You sit back and receive daily condensed knowledge, has…
Kill the Newsletter! - Convert newsletters into RSS feeds
Daily Time Tracking - Daily shows what you have been working on and for how long. It creates accurate timesheets by asking what you are doing, so no more timers or switching tasks. Use its data to submit your hours, create invoices or simply increase your productivity.