Polyvore is certainly an interesting web based tool. It helps you create sets of products by mixing and matching images from anywhere on the web. It has a cool drag and drop outfit creator which allows you to create sets easily. You can then publish and share the sets and also explore sets created by others. Each set has some items which can be purchased so if you like it, you can place an order too.
It can be a nice fun tool and if you like mixing and matching stuff, it can be highly addictive too. It has already amassed a good fan following with a lot of users creating sets. There are many more features and once you start using it, you will uncover them.
Check out Polyvore @ www.polyvore.com