I was wondering if a program besides Adobe Photoshop has this feature, to extract objects (people) from an image so the background can be changed. Maybe Gimp or Paint.NET?

Almost every advanced photo-editor / designing software (Including GIMP and Paint.NET) has that feature.
Just make sure you save it as a .png if you want the background to be transparent.

And it's similar to the Photo Shop Magic Extractor Tool? I don't mean the old fashion cut away or erase background method, I meant some thing like the Magic Extractor in Photoshop. And if it is can you explain it or give me a link to some tutorial or something.

By Magic extractor tool, I suspect that you mean the Magic Wand tool, then yes!

In GIMP, you have the "Fuzzy Select Tool" which is pretty much the same thing. You can read more about it here: http://docs.gimp.org/en/gimp-tool-fuzzy-select.html

In Paint.NET, you have the "Magic Wand Tool", which is also similar to the one found in Photoshop. You can read more about it here: http://www.getpaint.net/doc/latest/en/MagicWand.html

Originally Posted by Stamga

By Magic extractor tool, I suspect that you mean the Magic Wand tool, then yes!

Not excatly I mean this: http://www.ginismagic.blogspot.com/2...hotoshops.html. It shows what I'm talking about but the Magic Wand Tool looks like it can serve the same purpose . Thanks for the help, I'll probably play around with it for a bit.

I actually didn't even know that the tool existed in Photoshop..

I looked all over the web and there doesn't seem to be anything that replaces it in Paint.NET nor GIMP, so I suggest you to use the Magic Wand tool instead.