BuiltWith.com is a new technology profiler that will reveal what technology is powering websites.
"Upon looking up a page, BuiltWith returns all the technologies it can find on the page. BuiltWith’s goal is to help developers, researchers and designers find out what technologies pages are using which may help them to decide what technologies to implement themselves.", reads one of the pages on BuiltWith.
BuiltWith will give you the HTML standards and CSS, blogging and wiki platforms, widgets used and hosting server software.
For web designers and more tech savvy library staff BuildWith is not such a helpful tool. The real power of BuiltWidth is when librarians find a website, blog or a wiki that they like and they want to incorporate it on their library page. Before recommending the site to IT, I am sure that librarians will be happy to learn what technologies were involved.