Closet Viewer is a site that allows you to sign up for free, and upload pictures of your clothing, add details such as the season, size, type of clothing, ect. It also allows you to use the calendar to see when you wore something and when you are planning on wearing something. You can also see your friends wardrobes and send notes asking to borrow items from friends.
In principle, I really like this idea; however, in practice it is hard to get started if you already have a large wardrobe. Who has time to photograph all the pieces in their closet and fill out a form for each one. Not me, for one. If you are only just starting to be interested in clothing, and your current wardrobe is limited, this might be a neat site.
I believe that this site would work better if it were like Polyvore, and you could either upload your own photo, or search for photos already in the database, as I believe that this would be much simpler and less time consuming.