Email Tracker is a free email tracking Chrome extension for Gmail. Know when your emails are opened, insert tracked links and get valuable insights.

MailHippo empowers users to start sending and receiving fully encrypted HIPAA-compliant emails within minutes.

DigitalME: Where email marketing transcends into personalized excellence, driving engagement and growth for businesses.

A nice little forum site with built-in email capabilities

Leadkit is a suite of tools every marketer needs, everyone pays for a lot of different tools from scraping the leads to verifying them and then a whole different tool-set for sending mass email campai