V12 Data - V12 Data offers rich data sets with verified addresses and emails for personalized marketing campaigns.
HubSpot - Grow Better With HubSpot: Software that's powerful, not overpowering. Seamlessly connect your data, teams, and customers on one CRM platform that grows with your business.
Lotame - Make your data actionable, learn about your most valuable customers, improve ROI by targeting the right audience and increase relevance across screens.
ActiveCampaign - Integrated email marketing, marketing automation, and small business CRM. Send beautiful newsletters, setup behavioral based automations, and benefit from sales automation.
Google Audience Center - 3 votes and 6 comments so far on Reddit
Pardot - Salesforce B2B marketing automation