Recently, I found an interesting Wiki/CMS/Database hybrid called Wagn, where the most important unit of information is the 'Card'. That terminology immediately made me think of Hypercard. As expected, there is some "Hypercard-ness" in that application.

Do you know of other web applications/frameworks with that "Hypercard-ness" thing, or if its successor still must be invented?

Note: I insist on web applications because I already know the desktop ones.