Sure. Hypercard was something like a mutant hybrid of a database, a simple programming language (or a scripting language, really), and a website.
Basically, you created "stacks" of "cards". Each card could have a variety of media on it--text, images (later on color was sort of cobbled in), sound, and I believe even video. You could create clickable and editable objects on these cards, as well, and when the user clicked objects or did other things you could program the system to do various events.
The basic card-with-media-containers style was something like web pages of today, and a lot of informational hypercard stacks (which I made many of) were quite a bit like a nice looking modern website, and can easily be replaced by one.
Since you could programatically create new cards, you could also sort of do database things--heck my boss still, to this very day, uses a Hypercard stack for his addressbook... on OSX 10.2! Still works just fine, shockingly enough. These capabilities can be recreated with a web frontend to a MySQL database, but that's a whole lot of work, and they can also be duplicated by specific applications (Address Book). The closest modern equivalent, though, is Filemaker, but that's ten times more expensive and harder to learn.
Finally, the built-in programming features (using a language that was even easier to learn that Applescript) could do everything from perform simple operations when you clicked to fairly fancy sequences of events. This sort of functionality can be replicated by Applescript, but again that is significantly harder to learn, and doesn't come with as easy a way to create a user interface.
So, there are now apps that can do everything Hypercard could do (Filemaker strikes me as the one closest to it, though still much different and vastly harder to use), but not really any single thing that puts them all together and makes them as easy as Hypercard did.
Hypercard was my second programming language, and I created a lot of great applications with it during high school. At this point, most of what I did can easily be replicated with the web, but it had a lot of potential that was never tapped. There is Supercard still (I think), but Hypercard will be sorely missed.
