GetNotify - GetNotify is a free email tracking software solution.
Mailtrack.io - The best email tracking solution I've found. Free
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.
Komiko - Komiko is a sales intelligence solution to drive sales, retention and expansion.
EmailGreen - EmailGreen is a web-based email marketing and comprehensive CRM solution that is created to help organizations and companies manage their contacts and execute all the valuable campaigns as well as optimize social media channels among other so they c…
Intelliverse Email Tracker - Intelliverse Email Tracker provides insights to increase the productivity of your emails.