3D molecular structure imaging software - can anyone help

[Cyberus]

Hi guys.
I was wondering if any of the chemists or perhaps physicists (glancing towards Kenny and Blobrana) know of any [preferably] free programs to generate a 3D molecular structure model for compounds [you know the ball and stick type ones].
It wouldn't have to be anything too fancy, but it would need to be user friendly [and bear in mind I'm a physicist, not a chemist]. And generate nice-looking images that can be freely used/distributed

Can anyone help?

T'would be much appreciated

Cheers

 :-)

[Cyberus]

That's really helpful mate, thanks. I wouldn't have known where to look.

Now I just need to find out if I can use the output freely - i.e. images are not copyrighted or anything