I've tried and installed loads of free WP plugins that can't do what I would like them to do.
I write a fictional news blog and I'd like to be able to display about a dozen or so adverts that I've made myself. They are each going to be 250x250px and need to be in the sidebar of my site. I figured it would be easier if it was in a widget.
I'm not using a external service like Adsense. It's not necessary that my adverts keep record of impressions and they don't have a hyperlink.