ReadNotify - ReadNotify enables the user to know when email is sent and the reciever reads the email.
Strike - Share your experience and hold businesses accountable 👊
GetNotify - GetNotify is a free email tracking software solution.
Rainmaker - Rainmaker allows you to make your Google Contacts better.
Intelliverse Email Tracker - Intelliverse Email Tracker provides insights to increase the productivity of your emails.
Heroes - Fast-moving, Nibbles-like arcade game with retro-style graphics.