There is a very good website:
www.bannermakersite.com. You can edit flash banners free! You are not required to registrate at all, if You just want to have a look at the pictures and flash animations You could useon Your own banners! You are also allowed to try the editor in the case You haven’t registrated yet. I guarantee that You are going to registrate in the case You try it, because this site is fantastic.