Bananatag - Find out what happens to your emails after you press send! Add email tracking, attachment tracking, email scheduling and templates to your daily emails.

Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.

GetNotify - GetNotify is a free email tracking software solution.

Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES

Intelliverse Email Tracker - Intelliverse Email Tracker provides insights to increase the ​productivity of your emails.

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