Polyvore is a member based web application that allows its users to sort through uploaded images or those grabbed from around the web, to create collages for inspiration and to share with others.
The site’s main focus is fashion, with a major membership (likely) of teenage girls. Filter through the images by garment or accessory type, brand and color, or any keyword necessary to your design. They also include interiors and whatever else people can come up with. With the color sorter it would seemingly make it very easy to put together the perfect palette, making it a useful tool for any color lover.