LinkedIn Sales Navigator - Sales tool for LinkedIn users.
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!
Gainful.io - Capture B2B leads on AngelList, CrunchBase and LinkedIn
Visitor Queue - Better identify the companies that visited your website!
Clearbit - Clearbit provides Business Intelligence APIs
Elucify - A completely free software tool that uses crowdsourced data to find business email addresses