Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
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
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.