Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.
GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.
Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES
MkDocs - Project documentation with Markdown.
Hiver - Manage Customer Support, Sales and Projects right from your Gmail inbox. Collaborate with Shared Labels, Shared Contacts, email notes, email reminders and email templates
Docusaurus - Easy to maintain open source documentation websites