Flightradar24.com is a real time flight tracking service that provides you with information about aircraft flying around the world and their location on a map. Clicking on a plane will bring up details about the flight, including the type of aircraft, altitude, speed and other information. You can even switch to a rendered “cockpit view” (using a Google Earth plugin) . Flightradar24.com also has apps for iOS, Android and Windows Phone.
See Flightradar24.com view of the Caribbean.
Clicking on an airport would bring up the list of arrivals and departures. Below is a screenshot showing the listing for Piarco Airport, Trinidad and Tobago.
(H/T : The Loop)