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.
What's new in this version:
This version contains over 70 closed bugs and includes some wishes and new nice features - like visualization of the zodiacal light and new sky cultures.