Usability 
Zillow is a familiar name for house hunters in the US. It's s a real estate search site that was started by a couple of Microsoft and Expedia alumni and has really taken off, thanks to a unique interface that makes obscure public records of home sales and assessments highly available and accessible to anyone.
You can enter any US residential address on the Zillow site and get back you all sorts of information about the property; square footage, number of bedrooms and baths and a computer generated "Zestimate" of the home's value. If the home is currently for sale, Zillow adds details from the sale listing including, photos, description and asking price.
Zillow also lets you search for properties for sale or rent. On the desktop search results include a Microsoft/Nokia satelite map of the neighborhood with each for sale house's asking price printed on the roof! The mobile search results hides its (non-satelite) map on a sub-opage, but includes a thumbnail image of each property along with the asking price, square footage and address. Another feature for homeowners is the ability to set a "Make Me Move" price without actually putting the house on the market or even revealing their identity. Make Me Move homes are displayed with a blue icon on the map. Interested parties can contact the owner through Zillow.
Zillow uses a hybrid design for its mobile webapp. There are separate mobile formatted versions of the search form and search results pages. The individual propert listing pages use a responsive web design that reformats itself on the fly to fit the width of mobile, tablet and desktop browsers
