Wolfram Alpha, a search engine that gives you access to the world’s facts and data and calculates answers across a range of topics, including science, technology etc has just launched a flight search feature- a tool that help you answer questions and many more interesting queries about commercial and other flights.
Try the simple query “flights overhead” and you’ll get information on aircraft that should be visible to you, assuming a clear sky and unobstructed view. If you’re on a location-aware mobile device, the results should be based on your precise latitude and longitude—otherwise, Wolfram|Alpha will use the best available location information from your browser. Clicking on any of the flight titles gives more details. Also note that hovering over an individual plane in the sky map will produce a tooltip with the airline and flight number: