Stellarium is a free open source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope.It is being used in planetarium projectors. Just set your coordinates and go.
"Stellarium is a free open source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope."
A List of Astronomy Apps for iPhone and iPad which contains Free and some premium apps. Download these apps from Apple Store and start Exploration easily.