wp-realty-mole

~Bear in mind this review is by a contributer~ I have this plugin installed and running at realtymole.net/wordpress if you'd like to see it in action. The plugin works great and the rent estimate is very accurate in comparison with other rent estimate tools on the market. I did not create this plugin - that was moneals- but I have been using it extensively on our site and I have had no problem with it. We will be updating it soon to provide more features and functionality as well. You can try it out for free, so don't just take my word for it!