Product Hunt Leaderboard - The top products, hunter and makers.
IntouchApp - Universal contacts manager for mobile.
500 Makers - An updated list of the Top 500 Makers on Product Hunt
ContactRescue - Magically get your address book up-to-date and accurate
Open Census Data - Visualize & download neighborhood demographic Insights
Amplemarket Midas - Enriched contact information for your lists of emails