Webbers Corner

You can make your own simple or even complex game with zero programming knowledge using this program: http://www.clickteam.com/eng/tgf2.php

That site company offers other products which allow you to create good looking games, without much knowledge as well, however I feel that TGF2 is the easiest to use. It's perfect for making your own platformer like Mario.

However, it's not free, but they do have a demo version so you can test it out and see what you can come up with.

interesting.  another free one is http://scratch.mit.edu/, not sure how good as i haven't tried it yet.

I checked out that scratch site and it doesn't look as complex, however, it's good if you want to create a mini game. I might try it and I'll post what I come up with here, maybe it can be the official Webbers Corner game lol