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There are a bunch of very similar RE search sites out there. I would not be surprised if a lot of them started out from the same code base. Does anyone know if these are all custom built, or if some of them spawn from a common code base?


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No. They aren't all from the same code base.

Interestingly, at least two of them are ColdFusion based: the Windermere one and the one. The URL schema is very different, though. I think the one may be using a ColdFusion framework (Fusebox?), but maybe the Windermere one is not.

In contrast the site uses ASP.NET (.aspx), as is They're very different from each other, structure-wise.

I could not determine (quickly) what Estately is using. FWIW, I thought their site was more polished and quite modern in comparison to the others.

If there is a common thread, it's the data. There are a number of APIs they could be using that are common, despite the lack of commonality in the programming. Here is a site that lists web API available for consumption:

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+1, Very nice answer! – BenV Dec 8 '10 at 22:37

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