Sumo - Free tools to grow your email list.
HubSpot CRM - Free CRM software for small businesses.
OptinMonster - OptinMonster helps to convert abandoning website visitors into subscribers and customers.
Less Annoying CRM - A simple customer relationship manager made just for small businesses. Manage contact info, track leads, and never miss a follow-up.
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.
Keap - Grow Sales. Save Time. Get Organized.