Elucify - A completely free software tool that uses crowdsourced data to find business email addresses
Leadfeeder - Leadfeeder converts your website visitors into sales. Connect your website's Google Analytics to Leadfeeder and unlock the power of seeing who`s visiting your site!
Integrate - Integrate powers customer acquisition by connecting media programs and prospect data with marketing and sales systems.
Clearbit - Clearbit provides Business Intelligence APIs
Lead Forensics - B2B website analytics and lead generation.
AeroLeads - AeroLeads is a lead generation software which finds prospects with email and phone number.