People Data API - PIPL's People Data API provides one API to retrieve structured social, contact, demographic & professional information about a person.

Clearbit - Clearbit provides Business Intelligence APIs

Peekdata - Peekdata is a Schema-less, Rest based Data API Gateway to get Data from Multiple Data Sources

Memotoo - Memotoo allows you to sync your data (contacts, calendar, tasks, .) with phones (iPhone, Android, Samsung, ..

Eligible - Payment Infrastructure for Healthcare. Eligible is a software suite that increases yield while decreasing cost to collect.

Free Address Book - In our contact management software you can store fast and easily name, phone numbers, birthdays, address, company name, city, mobile numbers, insurance and loan info, e-mail addresses.