GD Star Rating plugin allows you to set up rating system for posts, pages and comments in your blog. You can set many options for displaying the rating stars, and also add widgets into the sidebars for displaying top ratings and other statistics generated by the plugin. Plugin includes advanced settings panels that will allow you to control many aspects of rating.

Multi rating is almost completed. You can check out Multi Sets panel where you can build multi rating sets. Each element of the set has different weight for calculating overall rating. Each post can have one instance of each rating set, and sets will support almost everything regular rating supports.

Pricing: Free
Requirements: -
Source: http://www.gdstarrating.com/