[Request] Ratings system

The script I need is pretty simple.

I'd like to add posts to a quote website, each page has a list ten quotes (the more quotes, the more pages)

For example I have a "Most popular quotes" category, I'd like users to be able to either thumbs up, or thumbs down the quote. Each time it is given a thumbs up you add a point, every time it receives a thumbs down a point is taken away.

Then the list is ranked, most popular at the top (highest number of points), descending to the least popular (least number of points).

An example is sickipedia, without the user system. Just the ratings.

Thanks!