V12 Data - V12 Data offers rich data sets with verified addresses and emails for personalized marketing campaigns.
Joomag - Joomag is the all-in-one digital publishing platform empowering businesses large and small to create, distribute, track, and monetize their interactive content.
Lotame - Make your data actionable, learn about your most valuable customers, improve ROI by targeting the right audience and increase relevance across screens.
uberflip - Organize and Centralize ALL of your Content in minutes
Google Audience Center - 3 votes and 6 comments so far on Reddit
Outgrow - Enabling marketers boost conversion with interactive, beautiful & viral quizzes/calculators.