WIKISKY is a map of constellations with detailed information on objects in the sky - you can click on the various stars or search the database. You can even see the constellations in the sky from your location.
Click on the left-most button for the awesome Sloan Digital Sky Survey (SDSS) view.
Link
Click on the left-most button for the awesome Sloan Digital Sky Survey (SDSS) view.
Link