Hunter - Find all the email addresses related to a domain
Wheel of Popups - Interactive exit-intent website popup for lead generation
Snov.io - Sales engagement on autopilot.
Magic Popup by Frontender - Convert visitors Into email list subscribers
Apollo.io - Apollo’s predictive prospecting, sales engagement, and actionable analytics help the teams to reach its full revenue potential.
Free Popup Builder - Popup Builder is a completely free tool that helps you create high converting, promotional and informative popups, increase conversion rates and boost sales.