SalesOptimize - Selling to online retailers? Revolutionary sales lead generation search engine driven by deep web analytics
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!
Rescan.io - Find the technology stack behind any website. Get the lists of websites using any technology.
Clearbit - Clearbit provides Business Intelligence APIs
Elucify - A completely free software tool that uses crowdsourced data to find business email addresses
Lead Forensics - B2B website analytics and lead generation.