Stellarium (www.Stellarium.org) is an awesome, free program that takes the location that you enter and shows you a realistic sky in 3-D. A star catalog of more than 600,000 stars, constellation outlines and pictures. This program even has the ability to drive some telescopes. A must for star gazers.
Not many things compare to sitting out on a summer night and staring up at a star filled sky. When you are done picking out the big dipper and the north star, and want to know more about that redish looking flicker directly overhead, get Stellarium.