Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
V12 Data - V12 Data offers rich data sets with verified addresses and emails for personalized marketing campaigns.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Adobe Audience Manager - Adobe Audience Manager is a data management platform that integrates online and offline data to deliver a unified view of all your audiences
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
Google Audience Center - 3 votes and 6 comments so far on Reddit