The WolfNet IDX for WordPress plugin provides IDX search solution integration with any WordPress website.
Try before you buy this plugin. It does not offer a good end to end customer experience. It has many gaps in the solution. Individual parts of the plugin are nice, but the integrated customer experience is poor. For example when a user is viewing a list of properties via a Listing Grid and you click on an individual property to see the details, there is no intuitive way to get back to the listing grid of properties, instead you click "Back to Search" it takes you to a new search screen and completely ignores the Listing Grid you came from.
I depend on my real estate website for a lot of my business. Wolfnet has been down for two days straight (resulting in blank pages). I've emailed support 48 hrs ago but no response so far.
It also seems to have issues loading some of the images. If it weren't for the discount broker price, I would choose another service. I guess you get what you pay for.