data.world - The social network for data people
Eligible - Payment Infrastructure for Healthcare. Eligible is a software suite that increases yield while decreasing cost to collect.
Datawhale - Powerful people data for enterprises.
Pipl - The most comprehensive people search. Pipl is the place to find the person behind the email address, social username or phone number.
DataQuest Beta - Codecademy for Data Science
People Data API - PIPL's People Data API provides one API to retrieve structured social, contact, demographic & professional information about a person.