Here is the list of free website/ blog Ads banner designer. These Ads you can pot in other website/blog as  an link exchange program or you can buy space for your ad in many other websites/blog. I found one website today which helps website owners to create moving/GIF ads free.
Below is the example of one such ad i created.

If you find interesting this then you can also create such ads for free. As i just find one website right now i will post only 1 website which provides this service free.

1. AdDesigner -This website create your ads for free. Its has a large gallery of inbuilt styles of ads you just have to write the text in it. You can even change the colour. For this they will just show a link in your ad nothing else.