Nikon D3100 Free Control Alternative?

I have a Nikon D3100, and would would love to have a software like control pro or something like that. Any suggestions for alternatives? I have a PC

What do you mean exactly by "software control"?

Do you mean post-processing software? If so, I can suggest Photoshop Elements 9 for around $80.

But if you can't afford that, then I suggest GIMP: http://www.gimp.org/....gimp.org/