TelephoneLists.Biz - Telephonelists.biz is the source for phone leads for sale, provides the agents with a wide audience full of leads ready to become the next customers.
Lotame - Make your data actionable, learn about your most valuable customers, improve ROI by targeting the right audience and increase relevance across screens.
LeadGibbon - Access millions of business contacts, with verified email addresses and phone numbers
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
Salestools - Monitor your Linkedin newsfeed for keywords to obtain leads.
Google Audience Center - 3 votes and 6 comments so far on Reddit