Grapeshot - Grapeshot builds connections for marketers to reach consumers using page crawling algorithm, providing audience targeting solutions.
Lotame - Make your data actionable, learn about your most valuable customers, improve ROI by targeting the right audience and increase relevance across screens.
Clicksor - Promote your business with today's most effective contextual online advertising and re-targeting technology and behavioral Marketing Services at a cost effective metric of CPC, PPC, CPM or CPV.
V12 Data - V12 Data offers rich data sets with verified addresses and emails for personalized marketing campaigns.
RetargetApp - RetargetApp helps you re-engage your site visitors who left without making a purchase.
Google Audience Center - 3 votes and 6 comments so far on Reddit