Yes, this is vBulletin. We have a reputation system which works similarly to ratings but is a bit more complex. On each post, on the left where it tells you about the user there's a few buttons on the bottom. The second one that looks like a balance is the reputation button. You can add either negative or positive reputation to a user for a good or bad post and it will affect how many of those green bars they have after the words rep power. The amount that it affects it is determined by the number before the green bars, which is determined based on both the amount of reputation that you give and receive. See, it's a bit more complex but basically it does the same thing: tell you who is contributing most quality to the community.