SurveyCTO - Collect data you can trust Offline or online, in the field, on the street, or in the lab.
V12 Data - V12 Data offers rich data sets with verified addresses and emails for personalized marketing campaigns.
CommCare - The digital platform for impactful frontline work everywhere
Lotame - Make your data actionable, learn about your most valuable customers, improve ROI by targeting the right audience and increase relevance across screens.
DHIS2 - Manage aggregate data with a flexible data model which has been field-tested for more than 15 years.
Google Audience Center - 3 votes and 6 comments so far on Reddit