The Url is perhaps the best example of the idea being the invention. Here is a site that anyone could have bought for under ten bucks a decade ago, but didn’t. Well, It’s too late now. Upsidedowndogs is a site full of upside down pictures of upside down dogs. It may not be any great revolution for society at large, but the site is a perfect example of maximum success for minimum effort, and it is hard to not be cheered by a visit.