Rating System

Does anyone know of a rating system that is opensource and easy to hack?

I am wanting to add the feature to Yay! Monday! so it can be more user driven, the functionality I am looking for is:

  • Each design is rated and logged based on ip (I don’t want accounts)
  • Designs would then be sorted by highest rating.

Pretty simple. I may just end up coding it myself, but I am super busy and kinda want to just get something going. thanks bros