ReadNotify - ReadNotify enables the user to know when email is sent and the reciever reads the email.
OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
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.
WooCommerce - A freely available eCommerce plugin that enables shop facilities on your WordPress website. Functionality enabling extensions & beautiful themes available.
GetNotify - GetNotify is a free email tracking software solution.
PrestaShop - Create your online store with PrestaShop's free shopping cart software. Build an ecommerce website for free and start selling online with hundreds of powerful features.