Ever wonder what technology goes in to powering your favorite site?  Ever wonder how many other sites out there use similar tech?  Sometimes it's easy to figure out by looking at file names or header information, sometimes it's a little more difficult and you have to dig through source code to discover what makes a site tick.  To answer these burning questions, a pretty nifty website has cropped up that will automatically analyze any site you feed it, break it out into a bunch of pieces and tell you what % of other sites profiled use the same bits of tech.

BuiltWith.com examines a site and tells you information like:

• Frameworks
• Server Info
• Javascript libraries
• Ad networks & 3rd party services

As an example, check out the profile page for WinCustomize here.

This is a nifty tool if you're any sort of web developer, or are simply the curious sort.  Check out the full site at the link below, and try putting in a few of your favorite sites to see what makes them tick.