Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.
Vidpopup - Are you tired of the same old contact technique on your website?
Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES
VideoAsk - Typeform's VideoAsk is now available on your web browser
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
Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.