Followup.cc - FollowUp for email is a lightweight productivity suite that keeps your conversations and tasks from slipping through the cracks. Set perfectly timed reminders that arrive at the top of your inbox, right when you need them.
Elucify - A completely free software tool that uses crowdsourced data to find business email addresses
FollowUpThen - The simplest way to schedule an email reminder
Lead Forensics - B2B website analytics and lead generation.
Gmelius - Gmelius is the first collaboration platform designed for G Suite and your company's daily tools.
FindThatLead Prospector - Feed your sales team with daily leads.