Zillow

Ever wondered how much your (or other people’s) house is currently worth? Well, wonder no more! This is a really cool site, especially for people looking to buy / sell a home. It has a lot of other neat features such as sale history, comparison with other houses in the same zip code / county / state etc. I believe most if not all the info is taken from the state/county themselves, because the site seems to align the values closely with it.