Elucify - A completely free software tool that uses crowdsourced data to find business email addresses
Sumo - Free tools to grow your email list.
Lead Forensics - B2B website analytics and lead generation.
OptinMonster - OptinMonster helps to convert abandoning website visitors into subscribers and customers.
KiteDesk - Use KiteDesk sales prospecting software to generate leads from our premium data marketplace. Then reach prospects and build a sales pipeline with organized Lead Lists. Syncs direct with CRM too!
OptiMonk - OptiMonk is the most powerful Onsite Retargeting platform, that helps you increase the conversion rate of your site, and get more leads by recovering lost visitors.