App Inspired From Facemash

[TheInfernal]

Inspired from Facemash, is there an applcation that:
1) Scans the pictures in a folder
2) Shows two random pictures and asks me to choose which one I prefer
3) The picture I prefer will be the winner and gets a higher rating (as in chess ratings), while the losing picture loses rating
4) Repeats steps 2 and 3 indefinitely till it decides the ratings the pictures are accurate
5) Sorts the images by their rating