The StreetEasy Ruby SDK by arturo-kon communicates with the API to obtain properties' sales and rentals in Soho, NYC. A programming environment must be ready as developers receive an API Key to access the API.
Google has now made its closely-guarded Google Places API available to all developers, after nearly a year in closed beta. The API, first announced a year ago, returns business listings based on location. The search giant also added features that make the service useful for many types of local applications, in addition to simplifying the authentication process. With additional agreements, Google also allows for a healthy 100,000 queries, versus only 1,000 standard calls.
It's hard to find an online real estate site today that does not in some way incorporate maps. And so it's no surprise that another of the top ten tags at ProgrammableWeb is "realestate", now with 78 mashups tagged realestate.
When it comes to map mashups there's no doubt that Google Maps leads the way. On ProgrammableWeb we list 1,964 Google Maps mashups, almost four times as many as any other API. This popularity makes utilities built on top of Google Maps especially interesting, such as this contextual menu control, which pops up a menu when the user right clicks.