Clearbit - Clearbit provides Business Intelligence APIs
Zillow - Is that home for sale? What is it worth? Where can I find foreclosures? Stop wondering!
Memotoo - Memotoo allows you to sync your data (contacts, calendar, tasks, .) with phones (iPhone, Android, Samsung, ..
Trulia - Trulia’s top-rated real estate app helps you find the perfect home, wherever you are.
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.
LoopNet - LoopNet is an online commercial real estate marketplace that connects buyers, tenants, and investors.