FindThatLead Prospector - Feed your sales team with daily leads.

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.

Elucify - A completely free software tool that uses crowdsourced data to find business email addresses

GetNotify - GetNotify is a free email tracking software solution.

KiteDesk - Use KiteDesk sales prospecting software to generate leads from our premium data marketplace. Then reach prospects and build a sales pipeline with organized Lead Lists. Syncs direct with CRM too!

Mailtrack.io - The best email tracking solution I've found. Free