Stellarium

If, like me, you know virtually nothing about astronomy, wouldn't know which way to look through a telescope, but would quite like to be able to identify more than three objects in the sky, then Stellarium is just what you've been looking for. (Much more suitable than Google Earth-Sky or Sky-map.org for this particular purpose, if you ask me.)

As a very slightly geeky person, I found it easiest to navigate Stellarium using the keyboard: press 'H' for help, and 'M' to change the settings (location, time, etc.).