Sprint has released a Real Estate application for mobile. This Real estate application is capable of using the GPS service for finding the location and showing the nearby properties which are sold and the distance, map location etc are displayed. This application allows the user can see his or her location and all of the recent home sales in the area on the same map. In addition, the user can search by city and state to research multiple areas of interest, save properties to their phone, or call an agent for live support. The details of the property is well displayed with the nearby locations in the map. The application fetches data from the database Real Estate agent "Smarter Agent" where it display the information about the recently sold house and properties for the past 3 years.
you can take a look at this application if you are interested in developing applications for real estate markets. The Sprint's real estate application is only for U.S I think.