Planetarium by Neave Interactive is a website on which you can specify your current location and it will show you a map of the night sky based upon your location and the date. You can also use Planetarium without specifying your location and instead explore the night sky from any place on Earth. For Google Chrome users, Planetarium offers a Chrome Web App that you can add to your browser.
Applications for Education
Planetarium could be an excellent website and Chrome App to use in lessons about astronomy. Students can compare the constellations they see at home with those of people in other parts of the world at the same time.