Nestoria is a search engine to find homes and property. Originally launched in the UK in 2006, Nestoria Spain was launched in 2007.
As a vertical search engine, Nestoria aggregates qualified homes listings from property portals. Real estate portals channel their listings through Nestoria as a way of exposing further their offering.
Google uses Nestoria as the Google Maps API case study. Yahoo User Interface blog features Nestoria as a case study of YUI implementation.