There is a large amount of useful information that is stored in the header of QVD files. This gives information about the data in the file, when it was created and which app created it. This data is in an XML format and can be viewed in a text editor.
Being XML it can also be loaded in to QlikView and viewed there.
This blog post describes how this can be done and gives some background to the application uploaded here:
The application enumerates around a number of libraries and reads the header information from each QVD in those libraries. It persists the information it finds to a QVD and also creates a timestamped archive - so you can see how your QVDs are changing over time. By default this is written to the same folder you are querying QVDs from.
If you have any questions regarding getting this app set up please post in the comments below.
There is a QlikView version of this application also, which you can find here: