Add Rating Feature To Website

I have wordpress blog and want to add a rating system to the website. It doesnt have to be wordpress, but i would like to use an ajax based system and would like it to look integrated with the website. So as long as the header looks the same as the rest of the website is all i care about. I need a frontside and admin section for this system. Frontside I want users to be able to rate products and stores, so each one would require differe ...